Rai, U. R. (2015). Business communication (2 edition.).
Chicago Style aipamenaRai, Urmila; Rai. Business Communication. 2 edition. Himalaya Publishing, 2015.
MLA aipamenaRai, Urmila; Rai. Business Communication. 2 edition. 2015.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.