Kale, N. (2002). Business environment and development -S.Y.B.Com (5th.). Vipul.
Cita Chicago (17th ed.)Kale, N. Business Environment and Development -S.Y.B.Com. 5th. MUmbai: Vipul, 2002.
Cita MLA (9th ed.)Kale, N. Business Environment and Development -S.Y.B.Com. 5th. Vipul, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.