Gaya APA

(AP), J, W, T, M, C. (2012). Successfull Selling with Peak Performance (Edisi 1). Jakarta: Elex Media Komputindo.

Gaya MLA

(AP), Jenu, Widjaja, Tandjung,, M.M.,, CPM. "Successfull Selling with Peak Performance". Edisi 1 Jakarta: Elex Media Komputindo, 2012. TEXT.