Gaya APA
Creswell, J, W. et al
(2010).
Research design
(
Cet. 1)
.
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
Creswell, John, W.. et al.
"Research design".
Cet. 1
Yogyakarta:
Pustaka Pelajar,
2010.
Text.