APA Style

Aprilia, K. (s.a.). Mengapa bulu gagak berwarna hitam = Why black feathered crow . s.l.: Cahaya Agency.

MLA Style

Aprilia, Kharisma. "Mengapa bulu gagak berwarna hitam = Why black feathered crow". s.l.: Cahaya Agency, s.a.. Teks (Monograf).