Gaya APA
Educational Research. (1983).
New York:
Longman.
Gaya Chicago
Educational Research.
.
New York:
Longman,
1983.
Buku.
Gaya MLA
Educational Research.
.
New York:
Longman,
1983.
Buku.
Gaya Turabian
Educational Research.
New York:
Longman,
1983.
Buku.