Gaya APA

Covey, S, R., Ilyas, F. (2012). The 3rd Alternative (Cet. 2). Jakarta: PT Gramedia Pustaka Utama.

Gaya MLA

Covey, Stephen, R.., Ilyas, Fairano. "The 3rd Alternative". Cet. 2 Jakarta: PT Gramedia Pustaka Utama, 2012. Text.