APA-viite (7. p.)
Walther, G. R. (2005). Heat up your cold calls: How to make prospects listen, respond, and buy. Dearborn Trade Pub..
Chicago-viite (17. p.)
Walther, George R. Heat Up Your Cold Calls: How to Make Prospects Listen, Respond, and Buy. Chicago: Dearborn Trade Pub., 2005.
MLA-viite (9. p.)
Walther, George R. Heat Up Your Cold Calls: How to Make Prospects Listen, Respond, and Buy. Dearborn Trade Pub., 2005.
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