Chhokar,kiran B. (2004). Underrstanding environment. SAGE Publications.
Cita Chicago (17th ed.)Chhokar,kiran B. Underrstanding Environment. SAGE Publications, 2004.
Cita MLA (9th ed.)Chhokar,kiran B. Underrstanding Environment. SAGE Publications, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.