Lua APA (7ú heag.)

Chopra, B. (1989). Business environment: 1989-90 an outline (3rd.). T.R.F.

Lua i Stíl Chicago (17ú heag.)

Chopra, B. Business Environment: 1989-90 an Outline. 3rd. Pune: T.R.F, 1989.

Lua MLA (9ú heag.)

Chopra, B. Business Environment: 1989-90 an Outline. 3rd. T.R.F, 1989.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.