APA (7th ed.) Citation

Eysenck, H. J., Arnold, W., & Meili, R. (1972). Encyclopedia of psychology. Search Press.

Chicago Style (17th ed.) Citation

Eysenck, H. J., Wilhelm Arnold, and Richard Meili. Encyclopedia of Psychology. London: Search Press, 1972.

MLA (9th ed.) Citation

Eysenck, H. J., et al. Encyclopedia of Psychology. Search Press, 1972.