APA (7e ed.) Bronvermelding

Gordman Robert. (2006). Must-Have Customer: 7 steps to winning the customer you haven't got. Truman Talley Books St.Martin Press.

Chicago (17e ed.) Bronvermelding

Gordman Robert. Must-Have Customer: 7 Steps to Winning the Customer You Haven't Got. NewYork: Truman Talley Books St.Martin Press, 2006.

MLA (9e ed.) Bronvermelding

Gordman Robert. Must-Have Customer: 7 Steps to Winning the Customer You Haven't Got. Truman Talley Books St.Martin Press, 2006.