Doctor, R. (1983). Principles & practice of business communication (8th.). Sheth.
Citazione stile Chigago Style (17a edizione)Doctor, Radaha. Principles & Practice of Business Communication. 8th. Bombay: Sheth, 1983.
Citatione MLA (9a ed.)Doctor, Radaha. Principles & Practice of Business Communication. 8th. Sheth, 1983.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.