APA (7th ed.) Citation

Claridge, G., Canter, S., & Hume, W. I. (1973). Personality differences and biological variations : a study of twins / by Gordon Claridge, Sandra Canter and W.I. Hume: A study of twins. Pergamon.

Chicago Style (17th ed.) Citation

Claridge, Gordon, Sandra Canter, and Wilfred Ian Hume. Personality Differences and Biological Variations : A Study of Twins / by Gordon Claridge, Sandra Canter and W.I. Hume: A Study of Twins. Oxford: Pergamon, 1973.

MLA (9th ed.) Citation

Claridge, Gordon, et al. Personality Differences and Biological Variations : A Study of Twins / by Gordon Claridge, Sandra Canter and W.I. Hume: A Study of Twins. Pergamon, 1973.

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