APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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