APA (7th ed.) Citation

LL, C., DM, I., & ST, C. (1999). Taking time seriously. A theory of socioemotional selectivity. The American psychologist, 54(3), 165. https://doi.org/10.1037//0003-066x.54.3.165

Chicago Style (17th ed.) Citation

LL, Carstensen, Isaacowitz DM, and Charles ST. "Taking Time Seriously. A Theory of Socioemotional Selectivity." The American Psychologist 54, no. 3 (1999): 165. https://doi.org/10.1037//0003-066x.54.3.165.

MLA (9th ed.) Citation

LL, Carstensen, et al. "Taking Time Seriously. A Theory of Socioemotional Selectivity." The American Psychologist, vol. 54, no. 3, 1999, p. 165, https://doi.org/10.1037//0003-066x.54.3.165.