Gaya APA

Redfield, J., Koebarono, G, Y. (2014). The Twelfth Insight : The Hour of Decision (Edisi 1). Jakarta: PT Gramedia Pustaka Utama.

Gaya MLA

Redfield, James., Koebarono, Gita, Yuliani. "The Twelfth Insight : The Hour of Decision". Edisi 1 Jakarta: PT Gramedia Pustaka Utama, 2014. Text.