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