APA (7th ed.) Citation

Loehlin, J. C., & Nichols, R. C. (1976). Heredity, environment, & personality: A study of 850 sets of twins. University of Texas Press.

Chicago Style (17th ed.) Citation

Loehlin, John C., and Robert Cosby Nichols. Heredity, Environment, & Personality: A Study of 850 Sets of Twins. Austin: University of Texas Press, 1976.

MLA (9th ed.) Citation

Loehlin, John C., and Robert Cosby Nichols. Heredity, Environment, & Personality: A Study of 850 Sets of Twins. University of Texas Press, 1976.