Gaya APA

Windasuri, H., Susanti, H. (2017). Excellent Service: The Secrets of Building a Service Organization (ed. 1). Jakarta: Gramedia Pustaka Utama.

Gaya MLA

Windasuri, Heria., Susanti, Hyacintha. "Excellent Service: The Secrets of Building a Service Organization". ed. 1 Jakarta: Gramedia Pustaka Utama, 2017. Text.