Gaya APA
Social Science Research Methods. (1984).
New Jersey:
Prentice Hall.
Gaya Chicago
Social Science Research Methods.
~.
New Jersey:
Prentice Hall,
1984.
Buku.
Gaya MLA
Social Science Research Methods.
~.
New Jersey:
Prentice Hall,
1984.
Buku.
Gaya Turabian
Social Science Research Methods.
New Jersey:
Prentice Hall,
1984.
Buku.