Παραπομπή APA

Winkler, J. (1972). Winkler on marketing planning. Hutchinson.

Παραπομπή Chicago Style

Winkler, John. Winkler on Marketing Planning. London: Hutchinson, 1972.

Παραπομπή MLA

Winkler, John. Winkler on Marketing Planning. Hutchinson, 1972.