Gaya APA
Simangunsong, ., Cullinan, M. (1989).
Business Communication (principles And Processes) .
San Fransisco:
Holt, Rinehart and Winston, Inc.
Gaya MLA
Simangunsong, ., Cullinan, Mary.
"Business Communication (principles And Processes)".
San Fransisco:
Holt, Rinehart and Winston, Inc,
1989.
Text.