APA (7th ed.) Citation

Helson, H., & Bevan, W. (1967). Contemporary approaches to psychology. Van Nostrand.

Chicago Style (17th ed.) Citation

Helson, Harry, and William Bevan. Contemporary Approaches to Psychology. Princeton, N. J: Van Nostrand, 1967.

MLA (9th ed.) Citation

Helson, Harry, and William Bevan. Contemporary Approaches to Psychology. Van Nostrand, 1967.