Gaya APA

Heasley, B., Sihotang, D, P. (1999). English for Communication for SLTP Year 3 [Curriculum 1994] (Cet. 1.--). Jakarta: Erlangga.

Gaya MLA

Heasley, Brendan., Sihotang, Dion, P.. "English for Communication for SLTP Year 3 [Curriculum 1994]". Cet. 1.-- Jakarta: Erlangga, 1999. Text.