APA (7th ed.) Citation

Pennington, D. C., Gillen, K., & Hill, P. (1999). Social psychology. Arnold.

Chicago Style (17th ed.) Citation

Pennington, Donald C., Kate Gillen, and Pam Hill. Social Psychology. London: Arnold, 1999.

MLA (9th ed.) Citation

Pennington, Donald C., et al. Social Psychology. Arnold, 1999.