APA (7th ed.) Citation

Arianto, Y., , P. D. E. F., & , D. S. Z. A. (2013). The Language Learning Principles Reflected In EF's English Threshold 2 Textbook.

Chicago Style (17th ed.) Citation

Arianto, Yopi, Prof. Dr. Endang Fauziati , and Dra. Siti Zuhriah Ariatmi. The Language Learning Principles Reflected In EF's English Threshold 2 Textbook. 2013.

MLA (9th ed.) Citation

Arianto, Yopi, et al. The Language Learning Principles Reflected In EF's English Threshold 2 Textbook. 2013.