APA (7th ed.) Citation

LL, C., ST, C., & DM, I. (2000). Applying science to human behavior. The American psychologist, 55(3), 343. https://doi.org/10.1037/0003-066x.55.3.343.a

Chicago Style (17th ed.) Citation

LL, Carstensen, Charles ST, and Isaacowitz DM. "Applying Science to Human Behavior." The American Psychologist 55, no. 3 (2000): 343. https://doi.org/10.1037/0003-066x.55.3.343.a.

MLA (9th ed.) Citation

LL, Carstensen, et al. "Applying Science to Human Behavior." The American Psychologist, vol. 55, no. 3, 2000, p. 343, https://doi.org/10.1037/0003-066x.55.3.343.a.