Gaya APA

Sukarni, E, I., Widayati, S. (2003). Happy with English [6] : English Textbook for Elementary School Grade VI Semester 1 and 2 (Cet. 1.--). Jakarta: Ganeca Exact.

Gaya MLA

Sukarni, Emalia, Iragiliati., Widayati, Sri. "Happy with English [6] : English Textbook for Elementary School Grade VI Semester 1 and 2". Cet. 1.-- Jakarta: Ganeca Exact, 2003. Text.