Παραπομπή σε μορφή APA (7η εκδ.)

Helmstadter, G. C. (1970). Research concepts in human behavior: Education, psychology, sociology. Appleton-Century-Crofts.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Helmstadter, G. C. Research Concepts in Human Behavior: Education, Psychology, Sociology. New York: Appleton-Century-Crofts, 1970.

Παραπομπή σε μορφή MLA (8th εκδ.)

Helmstadter, G. C. Research Concepts in Human Behavior: Education, Psychology, Sociology. Appleton-Century-Crofts, 1970.