Chopra, B. (1989). Business environment: 1989-90 an outline (3rd.). T.R.F.
Chicago Style aipamenaChopra, B. Business Environment: 1989-90 an Outline. 3rd. Pune: T.R.F, 1989.
MLA aipamenaChopra, B. Business Environment: 1989-90 an Outline. 3rd. T.R.F, 1989.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.