Παραπομπή APA

Tull,Donald S, & Albaum,Gerald S. (1973). Survey research: A decisional approach. Intext Educational Publishers.

Παραπομπή Chicago Style

Tull,Donald S, και Albaum,Gerald S. Survey Research: A Decisional Approach. New York: Intext Educational Publishers, 1973.

Παραπομπή MLA

Tull,Donald S, και Albaum,Gerald S. Survey Research: A Decisional Approach. Intext Educational Publishers, 1973.