Gaya APA
Step by step guide to conect english. (1974).
New York:
Acco publishing company inc.
Gaya Chicago
Step by step guide to conect english.
.
New York:
Acco publishing company inc,
1974.
Buku.
Gaya MLA
Step by step guide to conect english.
.
New York:
Acco publishing company inc,
1974.
Buku.
Gaya Turabian
Step by step guide to conect english.
New York:
Acco publishing company inc,
1974.
Buku.