Gaya APA

Christie, A. (2021). And Then There Were None=Lalu Semuanya Lenyap (Cet. 13). Jakarta: gramedia pustaka utama.

Gaya MLA

Christie, Agatha. "And Then There Were None=Lalu Semuanya Lenyap". Cet. 13 Jakarta: gramedia pustaka utama, 2021. Text.