Παραπομπή σε μορφή APA (7η εκδ.)

LeBoeuf Michael. (1987). How to win customers and keep them for life. Berkley Books.

Παραπομπή σε μορφή Chicago (17η εκδ.)

LeBoeuf Michael. How to Win Customers and Keep Them for Life. Berkley Books, 1987.

Παραπομπή σε μορφή MLA (8th εκδ.)

LeBoeuf Michael. How to Win Customers and Keep Them for Life. Berkley Books, 1987.