Gaya APA

Siswoko, T., W, B, R. (2008). Rahasia Duri Alan: The Secret of Alan's Quill . Yogyakarta: Andi.

Gaya MLA

Siswoko, Tedi., W, Benedicta, Rini. "Rahasia Duri Alan: The Secret of Alan's Quill". Yogyakarta: Andi, 2008. Book.