Gaya APA
Babbie, Earl R.. (1973).
Survey Research Methods .
California:
WADSWORTH.
Gaya Chicago
Babbie, Earl R..
Survey Research Methods.
California:
WADSWORTH,
1973.
Teks.
Gaya MLA
Babbie, Earl R..
Survey Research Methods.
California:
WADSWORTH,
1973.
Teks.
Gaya Turabian
Babbie, Earl R..
Survey Research Methods.
California:
WADSWORTH,
1973.
Teks.