Gaya APA

BROWN, H, D., Lee, H. (2015). Teaching by Principles: An Interactive Approach to Language Pedagogy (Cet.4). London: Pearson Education Limited.

Gaya MLA

BROWN, H., DOUGLAS., Lee, Heekyeong. "Teaching by Principles: An Interactive Approach to Language Pedagogy". Cet.4 London: Pearson Education Limited, 2015. Text.