Gaya APA

Riyanto, S., Suryani, L. (2021). The Complete Book of The IELTS Preparation: Panduan Persiapan Tes IELTS (Cet.1). Yogyakarta: cv andi offset.

Gaya MLA

Riyanto, Slamet., Suryani, Laila. "The Complete Book of The IELTS Preparation: Panduan Persiapan Tes IELTS". Cet.1 Yogyakarta: cv andi offset, 2021. Art Original.