Gaya APA

Kartajaya, H., Asmara, B. (2014). WOW Service is Care (Cet.1). Jakarta: PT Gramedia Pustaka Utama.

Gaya MLA

Kartajaya, Hermawan., Asmara, Bayu. "WOW Service is Care". Cet.1 Jakarta: PT Gramedia Pustaka Utama, 2014. Text.