APA (7th ed.) Citation

Foster, K. R., Wenseleers, T., & Ratnieks, F. L. (2006). Kin selection is the key to altruism. Trends in ecology & evolution (Amsterdam), 21(2), 57-60. https://doi.org/10.1016/j.tree.2005.11.020

Chicago Style (17th ed.) Citation

Foster, Kevin R., Tom Wenseleers, and Francis L.W Ratnieks. "Kin Selection Is the Key to Altruism." Trends in Ecology & Evolution (Amsterdam) 21, no. 2 (2006): 57-60. https://doi.org/10.1016/j.tree.2005.11.020.

MLA (9th ed.) Citation

Foster, Kevin R., et al. "Kin Selection Is the Key to Altruism." Trends in Ecology & Evolution (Amsterdam), vol. 21, no. 2, 2006, pp. 57-60, https://doi.org/10.1016/j.tree.2005.11.020.