Gaya APA
W, G, Y. (2016).
How To Become A Highly Qualified Instructor (Cetakan 1, Januari 2016).
Yogyakarta:
Diandra Kreatif.
Gaya MLA
W, Gian, Yekti.
"How To Become A Highly Qualified Instructor".
Cetakan 1, Januari 2016
Yogyakarta:
Diandra Kreatif,
2016.
Book.