APA-viite (7. p.)

Greenberg, P. (2001). CRM at the speed of light: Capturing and keeping customers in internet real time. TMH.

Chicago-viite (17. p.)

Greenberg, Paul. CRM at the Speed of Light: Capturing and Keeping Customers in Internet Real Time. New delhi: TMH, 2001.

MLA-viite (9. p.)

Greenberg, Paul. CRM at the Speed of Light: Capturing and Keeping Customers in Internet Real Time. TMH, 2001.