Chopra, R. K. a. . A. C. (2006). Office management (14 Edition.).
Chicago Style aipamenaChopra, R K and Ankita Chopra. Office Management. 14 Edition. Himalaya Publishing House, Mumbai, 2006.
MLA aipamenaChopra, R K and Ankita Chopra. Office Management. 14 Edition. 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.