APA (7e ed.) Bronvermelding

Sewell, C., & Brown, P. B. (2002). Customers for Life: How to Turn that One-time Buyer into a Lifetime Customer. Crown.

Chicago (17e ed.) Bronvermelding

Sewell, Carl, en Paul B. Brown. Customers for Life: How to Turn That One-time Buyer into a Lifetime Customer. New York: Crown, 2002.

MLA (9e ed.) Bronvermelding

Sewell, Carl, en Paul B. Brown. Customers for Life: How to Turn That One-time Buyer into a Lifetime Customer. Crown, 2002.