Just a tiny number of the references evidencing natural selection.
Kreitman, M., & Akashi, H. (1995). Molecular evidence for natural selection. Annual Review of Ecology and Systematics, 26(1), 403-422.
Genovart, Meritxell, Nieves Negre, Giacomo Tavecchia, Ana Bistuer, Luís Parpal, and Daniel Oro. "The young, the weak and the sick: evidence of natural selection by predation." PLoS One 5, no. 3 (2010): e9774.
Beauchamp, Jonathan P. "Genetic evidence for natural selection in humans in the contemporary United States." Proceedings of the National Academy of Sciences 113, no. 28 (2016): 7774-7779.
Fenster, Charles B., and Kermit Ritland. "Evidence for natural selection on mating system in Mimulus (Scrophulariaceae)." International journal of plant sciences 155, no. 5 (1994): 588-596.
Blier, Pierre U., France Dufresne, and Ronald S. Burton. "Natural selection and the evolution of mtDNA-encoded peptides: evidence for intergenomic co-adaptation." TRENDS in Genetics 17, no. 7 (2001): 400-406.
Hirayasu, Kouyuki, Jun Ohashi, Hidenori Tanaka, Koichi Kashiwase, Atsuko Ogawa, Minoko Takanashi, Masahiro Satake et al. "Evidence for natural selection on leukocyte immunoglobulin-like receptors for HLA class I in Northeast Asians." The American Journal of Human Genetics 82, no. 5 (2008): 1075-1083.
Bustamante, Carlos D., Adi Fledel-Alon, Scott Williamson, Rasmus Nielsen, Melissa Todd Hubisz, Stephen Glanowski, David M. Tanenbaum et al. "Natural selection on protein-coding genes in the human genome." Nature 437, no. 7062 (2005): 1153-1157.
Grant, Peter R., B. R. Grant, J. N. Smith, I. J. Abbott, and L. K. Abbott. "Darwin's finches: population variation and natural selection." Proceedings of the National Academy of Sciences 73, no. 1 (1976): 257-261.
Akey, Joshua M., Michael A. Eberle, Mark J. Rieder, Christopher S. Carlson, Mark D. Shriver, Deborah A. Nickerson, and Leonid Kruglyak. "Population history and natural selection shape patterns of genetic variation in 132 genes." PLoS biology 2, no. 10 (2004): e286.
Cagan, Alexander, Christoph Theunert, Hafid Laayouni, Gabriel Santpere, Marc Pybus, Ferran Casals, Kay Prüfer et al. "Natural selection in the great apes." Molecular biology and evolution 33, no. 12 (2016): 3268-3283.
Andersen, Kristian G., Ilya Shylakhter, Shervin Tabrizi, Sharon R. Grossman, Christian T. Happi, and Pardis C. Sabeti. "Genome-wide scans provide evidence for positive selection of genes implicated in Lassa fever." Philosophical Transactions of the Royal Society B: Biological Sciences 367, no. 1590 (2012): 868-877.
Cain, Arthur J., and Philip M. Sheppard. "Natural selection in Cepaea." Genetics 39, no. 1 (1954): 89.
Millstein, Roberta L. "Natural selection as a population-level causal process." The British Journal for the Philosophy of Science (2006).
Hurst, Laurence D., Elizabeth JB Williams, and Csaba Pál. "Natural selection promotes the conservation of linkage of co-expressed genes." TRENDS in Genetics 18, no. 12 (2002): 604-606.
Haldane, J. B. S. (1936). Natural selection. Nature, 138(3503), 1053-1053.
Artacho, Paulina, and Roberto F. Nespolo. "Natural selection reduces energy metabolism in the garden snail, Helix aspersa (Cornu aspersum)." Evolution 63, no. 4 (2009): 1044-1050.
I could keep going until I filled up a 1000 pages of this thread and not be near reaching the end there is so much evidence supporting the theory of evolution and natural selection.