Gaya APA

Tandjung, J, W. (2008). Spiritual Selling How to Get and Keep Your Customers (Cet. 2). Jakarta: PT Gramedia.

Gaya MLA

Tandjung, Jenu, Widjaja. "Spiritual Selling How to Get and Keep Your Customers". Cet. 2 Jakarta: PT Gramedia, 2008. Text.