APA Style

Christie, A. (2007). Poirot's Early Cases - Kasus-Kasus Perdana Poirot . : Gramedia Pustaka Utama.

MLA Style

Christie, Agatha. "Poirot's Early Cases - Kasus-Kasus Perdana Poirot". : Gramedia Pustaka Utama, 2007. Printed Book.