Balasubrahmanian, M. (1997). Business communications (2nd rev. ed.). Kalyani.
Chicago Style aipamenaBalasubrahmanian, M. Business Communications. 2nd rev. ed. Ludhiana: Kalyani, 1997.
MLA aipamenaBalasubrahmanian, M. Business Communications. 2nd rev. ed. Kalyani, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.