Παραπομπή APA

Engel, J. F. (1968). Instructions guide for consumer behaviour. Holt Rinehart.

Παραπομπή Chicago Style

Engel, James F. Instructions Guide for Consumer Behaviour. New York: Holt Rinehart, 1968.

Παραπομπή MLA

Engel, James F. Instructions Guide for Consumer Behaviour. Holt Rinehart, 1968.