Doctor, R. (1983). Principles & practice of business communication (8th.). Sheth.
Chicago-referens (17:e uppl.)Doctor, Radaha. Principles & Practice of Business Communication. 8th. Bombay: Sheth, 1983.
MLA-referens (9:e uppl.)Doctor, Radaha. Principles & Practice of Business Communication. 8th. Sheth, 1983.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.