APA-ийн эшлэл(7 дахь хэвлэлт)

Gupta, S. (2008). Managing customers as investments. Pearson Power.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Gupta, Sunil. Managing Customers as Investments. New Delhi: Pearson Power, 2008.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Gupta, Sunil. Managing Customers as Investments. Pearson Power, 2008.