SHUKLA,G.S, & Upadhyay,V,B. (2001). ECONOMIC ZOOLOGY (4th ed.). New Delhi.
Cita Chicago (17th ed.)SHUKLA,G.S, i Upadhyay,V,B. ECONOMIC ZOOLOGY. 4th ed. Rastogi Publications: New Delhi, 2001.
Cita MLA (9th ed.)SHUKLA,G.S, i Upadhyay,V,B. ECONOMIC ZOOLOGY. 4th ed. New Delhi, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.