Gaya APA

Aik, K, C., Hui, K, K. (1992). Longman dictionary of grammar usage (Ed.2). Jakarta: Ernst Klett verlag.

Gaya MLA

Aik, Kam, Chuan., Hui, Kam, Kai. "Longman dictionary of grammar usage". Ed.2 Jakarta: Ernst Klett verlag, 1992. Text.