APA (7th ed.) Citation

Claridge, G., Canter, S., & Hume, W. I. (1973). Personality differences and biological variations: A study of twins International series of monographs on experimental psychology.

Chicago Style (17th ed.) Citation

Claridge, Gordon, Sandra Canter, and Wilfrid I. Hume. "Personality Differences and Biological Variations: A Study of Twins." International Series of Monographs on Experimental Psychology 1973.

MLA (9th ed.) Citation

Claridge, Gordon, et al. "Personality Differences and Biological Variations: A Study of Twins." International Series of Monographs on Experimental Psychology, 1973.