Gaya APA

Graham, M. et al (2001). Gogo Loves English 4, Teacher's Book (Vol. 4.--). Hongkong: Longman Asia ELT.

Gaya MLA

Graham, Melanie. et al. "Gogo Loves English 4, Teacher's Book". Vol. 4.-- Hongkong: Longman Asia ELT, 2001. Text / Book.