Gaya APA
Creswell, J, W.
(2002).
Research Design: Quanlitative & Quantitative Approaches
(
Cetakan II)
.
Jakarta:
KIK Press.
Gaya MLA
Creswell, John, W..
"Research Design: Quanlitative & Quantitative Approaches".
Cetakan II
Jakarta:
KIK Press,
2002.
.