Gaya APA

HANNA, M, S., WILSON, G, L. (1998). COMMUNICATING IN BUSINESS AND PROFESSIONAL SETTINGS (4). USA: Mc Graw Hill.

Gaya MLA

HANNA, MICHAEL, S., WILSON, GERALD, L. "COMMUNICATING IN BUSINESS AND PROFESSIONAL SETTINGS". 4 USA: Mc Graw Hill, 1998. Text.