Gaya APA

Sukarni, E, I., Tresnadewi, S. (2002). Happy with English [3] : English Textbook for Elementary School Grade III Semester 1 and 2 (Cet. 1.--). Jakarta: Ganeca Exact.

Gaya MLA

Sukarni, Emalia, Iragiliati., Tresnadewi, Sintha. "Happy with English [3] : English Textbook for Elementary School Grade III Semester 1 and 2". Cet. 1.-- Jakarta: Ganeca Exact, 2002. Text.