Gaya APA

Sudiyarto, O, , H., Pramono, P, R. (2006). 30 Menit Essay Writing , Writing is Easy (Ed.1). Yogyakarta: Andi.

Gaya MLA

Sudiyarto, Oktaviani, , Hastu., Pramono, Peni, R.. "30 Menit Essay Writing , Writing is Easy". Ed.1 Yogyakarta: Andi, 2006. Text.