Gaya APA
HARTY, K, J., Keenan, J. (1987).
WRITING FOR BUSINESS AND INDUSTRY: PROCESS AND PRODUCT .
New York:
The Macmillan.
Gaya MLA
HARTY, Kevin, J., Keenan, John.
"WRITING FOR BUSINESS AND INDUSTRY: PROCESS AND PRODUCT".
New York:
The Macmillan,
1987.
Textbook.