Gaya APA

Giokni, ., Gwee, J. (2010). Instant Quotations On Customer Service Excellence (ed. 1). Jakarta: Gramedia Pustaka Utama.

Gaya MLA

Giokni, ., Gwee, James. "Instant Quotations On Customer Service Excellence". ed. 1 Jakarta: Gramedia Pustaka Utama, 2010. Text.