APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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