Gaya APA
Research Design. (2016).
Yogyakarta:
Pustaka Pelajar.
Gaya Chicago
Research Design.
Ed 1.
Yogyakarta:
Pustaka Pelajar,
2016.
Text.
Gaya MLA
Research Design.
Ed 1.
Yogyakarta:
Pustaka Pelajar,
2016.
Text.
Gaya Turabian
Research Design.
Yogyakarta:
Pustaka Pelajar,
2016.
Print.