APA引文

Onyefulu, I., & Ifeoma Onyefulu. (1995). Emek: An African counting story. New York: Cobblehill Books.

Trích dẫn kiểu Chicago

Onyefulu, Ifeoma, và Ifeoma Onyefulu. Emek: An African Counting Story. New York: Cobblehill Books, 1995.

MLA引文

Onyefulu, Ifeoma, và Ifeoma Onyefulu. Emek: An African Counting Story. New York: Cobblehill Books, 1995.

警告：这些引文格式不一定是100％准确.