Gaya APA
Writing skills. ().
New York:
John Willey & Sons.
Gaya Chicago
Writing skills.
.
New York:
John Willey & Sons,
.
Text.
Gaya MLA
Writing skills.
.
New York:
John Willey & Sons,
.
Text.
Gaya Turabian
Writing skills.
New York:
John Willey & Sons,
.
Print.