Gaya APA

dkk, D, Y, K. (2009). English For Vocational Schools . Yogyakarta: LP2IP Gadjah Mada.

Gaya MLA

dkk, Dra., Yiyis, Krisnani,. "English For Vocational Schools". Yogyakarta: LP2IP Gadjah Mada, 2009. Text.