Gaya APA
Yin, Robert K.. (1989).
Case study research: design and methods .
America:
SAGE Publications.
Gaya Chicago
Yin, Robert K..
Case study research: design and methods.
America:
SAGE Publications,
1989.
Text.
Gaya MLA
Yin, Robert K..
Case study research: design and methods.
America:
SAGE Publications,
1989.
Text.
Gaya Turabian
Yin, Robert K..
Case study research: design and methods.
America:
SAGE Publications,
1989.
Print.