APA (7th ed.) Citation

Alexander, R. D. (1987). The biology of moral systems / Richard D. Alexander. A. de Gruyter.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.