APA (7th ed.) Citation

Alexander, R. D. (1987). The biology of moral systems. Aldine de Gruyter.

Chicago Style (17th ed.) Citation

Alexander, Richard D. The Biology of Moral Systems. New York: Aldine de Gruyter, 1987.

MLA (9th ed.) Citation

Alexander, Richard D. The Biology of Moral Systems. Aldine de Gruyter, 1987.