Gaya APA

ed, H, S, , , -. (1971). Handbook of public relations: standard guide to public affairs and communications (ed.2). United States of America: Mc Graw-Hill.

Gaya MLA

ed, Howard, Stephenson, , , -. "Handbook of public relations: standard guide to public affairs and communications". ed.2 United States of America: Mc Graw-Hill, 1971. Text.