Gaya APA
Research methods in the social sciences. (1989).
New York:
ST. Martin\'s Press.
Gaya Chicago
Research methods in the social sciences.
2nd.
New York:
ST. Martin\'s Press,
1989.
Buku.
Gaya MLA
Research methods in the social sciences.
2nd.
New York:
ST. Martin\'s Press,
1989.
Buku.
Gaya Turabian
Research methods in the social sciences.
New York:
ST. Martin\'s Press,
1989.
Buku.