Gaya APA
Creswell, John W.. (1994).
Research Design Qualitative & Quantitative Approaches .
London:
Sage.
Gaya Chicago
Creswell, John W..
Research Design Qualitative & Quantitative Approaches.
London:
Sage,
1994.
Text.
Gaya MLA
Creswell, John W..
Research Design Qualitative & Quantitative Approaches.
London:
Sage,
1994.
Text.
Gaya Turabian
Creswell, John W..
Research Design Qualitative & Quantitative Approaches.
London:
Sage,
1994.
Print.