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Gaya APA
Research Design. (2002).
New Delhi:
SAGE Publications.
Gaya Chicago
Research Design.
.
New Delhi:
SAGE Publications,
2002.
Text.
Gaya MLA
Research Design.
.
New Delhi:
SAGE Publications,
2002.
Text.
Gaya Turabian
Research Design.
New Delhi:
SAGE Publications,
2002.
Print.