Gaya APA
Babbie, Earl R.. (1973).
Survey research methods (1st ed).
California:
Wadsworth Publishing Company.
Gaya Chicago
Babbie, Earl R..
Survey research methods.
1st ed
California:
Wadsworth Publishing Company,
1973.
BUKU.
Gaya MLA
Babbie, Earl R..
Survey research methods.
1st ed
California:
Wadsworth Publishing Company,
1973.
BUKU.
Gaya Turabian
Babbie, Earl R..
Survey research methods.
1st ed
California:
Wadsworth Publishing Company,
1973.
BUKU.