Gaya APA
Social statistics. (1979).
New York:
Mc Graw-Hill.
Gaya Chicago
Social statistics.
.
New York:
Mc Graw-Hill,
1979.
Buku.
Gaya MLA
Social statistics.
.
New York:
Mc Graw-Hill,
1979.
Buku.
Gaya Turabian
Social statistics.
New York:
Mc Graw-Hill,
1979.
Buku.