Gaya APA
Babbie, Earl. (1998).
The practice of social research (Eighth Edition) .
USA:
Wadswort Publishing Company.
Gaya Chicago
Babbie, Earl.
The practice of social research (Eighth Edition).
USA:
Wadswort Publishing Company,
1998.
Text.
Gaya MLA
Babbie, Earl.
The practice of social research (Eighth Edition).
USA:
Wadswort Publishing Company,
1998.
Text.
Gaya Turabian
Babbie, Earl.
The practice of social research (Eighth Edition).
USA:
Wadswort Publishing Company,
1998.
Print.