Gaya APA

Hardika, V., Azzahrah, F. (2013). Friend Zone Forever (Cet. 1). Yogyakarta: Eazy Book.

Gaya MLA

Hardika, Vivie., Azzahrah, Fatimah. "Friend Zone Forever". Cet. 1 Yogyakarta: Eazy Book, 2013. Text.