Bhalla, A. S. (1992). Environment, employment, and development. International Labour Office.
Cita Chicago (17th ed.)Bhalla, A. S. Environment, Employment, and Development. Geneva: International Labour Office, 1992.
Cita MLA (9th ed.)Bhalla, A. S. Environment, Employment, and Development. International Labour Office, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.