Gaya APA
HENDERSON, G, L., VOILES, P, R. (1980).
Business English Essentials. (6).
New York:
McGraw-Hill Book Company.
Gaya MLA
HENDERSON, Greta, LaFollette., VOILES, Price, R.
"Business English Essentials.".
6
New York:
McGraw-Hill Book Company,
1980.
Text.