Chopra, B. (1989). Business environment: 1989-90 an outline (3rd.). T.R.F.
Chicago-čujuhus (17. p.)Chopra, B. Business Environment: 1989-90 an Outline. 3rd. Pune: T.R.F, 1989.
MLA-čujuhus (9. p.)Chopra, B. Business Environment: 1989-90 an Outline. 3rd. T.R.F, 1989.
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