Gaya APA
Creswell, John W.. (2003).
Research design : qualitative & quantitative approaches (ed. 2).
America:
SAGE Publications.
Gaya Chicago
Creswell, John W..
Research design : qualitative & quantitative approaches.
ed. 2
America:
SAGE Publications,
2003.
Text.
Gaya MLA
Creswell, John W..
Research design : qualitative & quantitative approaches.
ed. 2
America:
SAGE Publications,
2003.
Text.
Gaya Turabian
Creswell, John W..
Research design : qualitative & quantitative approaches.
ed. 2
America:
SAGE Publications,
2003.
Print.