Gaya APA
BABBIE, Earl. (1986).
The practice of social research (4th. ed.).
California:
Wadsworth Publishing Company.
Gaya Chicago
BABBIE, Earl.
The practice of social research.
4th. ed.
California:
Wadsworth Publishing Company,
1986.
Textbook.
Gaya MLA
BABBIE, Earl.
The practice of social research.
4th. ed.
California:
Wadsworth Publishing Company,
1986.
Textbook.
Gaya Turabian
BABBIE, Earl.
The practice of social research.
4th. ed.
California:
Wadsworth Publishing Company,
1986.
Textbook.