Gaya APA

Sewell, Carl, Brown, Paul B. (1990). Customers for life : how to turn that onetime buyer into a lifetime customer . New York: Doubleday Currency.

Gaya Chicago

Sewell, Carl, Brown, Paul B. Customers for life : how to turn that onetime buyer into a lifetime customer. New York: Doubleday Currency, 1990. Buku.

Gaya MLA

Sewell, Carl, Brown, Paul B. Customers for life : how to turn that onetime buyer into a lifetime customer. New York: Doubleday Currency, 1990. Buku.

Gaya Turabian

Sewell, Carl, Brown, Paul B. Customers for life : how to turn that onetime buyer into a lifetime customer. New York: Doubleday Currency, 1990. Buku.