Gaya APA

Riyanto, S. et al (2008). Developig grammar skills for the toeic test (Cet 1). Yogyakarta: Pustaka Belajar.

Gaya MLA

Riyanto, Slamet. et al. "Developig grammar skills for the toeic test". Cet 1 Yogyakarta: Pustaka Belajar, 2008. Text.