Gaya APA
Babbie, Earl. (1992).
The Practice of social research (6th ed).
Belmont, CA:
Wadsworth.
Gaya Chicago
Babbie, Earl.
The Practice of social research.
6th ed
Belmont, CA:
Wadsworth,
1992.
Text.
Gaya MLA
Babbie, Earl.
The Practice of social research.
6th ed
Belmont, CA:
Wadsworth,
1992.
Text.
Gaya Turabian
Babbie, Earl.
The Practice of social research.
6th ed
Belmont, CA:
Wadsworth,
1992.
Print.