Gaya APA

all, C., G., E. (2013). ESSAY WRITING ENGLISH FOR ACADEMIC PURPOSES (II). Yogyakarta: Andi Offset.

Gaya MLA

all, Cheryl, Groth,, Et. "ESSAY WRITING ENGLISH FOR ACADEMIC PURPOSES". II Yogyakarta: Andi Offset, 2013. Buku Inti.