APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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