Παραπομπή APA

Engel, J. F. (1972). Market Segmentation. Holt Rine hart and Winston.

Παραπομπή Chicago Style

Engel, James F. Market Segmentation. New york: Holt Rine hart and Winston, 1972.

Παραπομπή MLA

Engel, James F. Market Segmentation. Holt Rine hart and Winston, 1972.