Agrawal, V. K. (2002). Simplified Course in Ecology and Ethology (1st. ed.). S. Chand & Company Ltd..
Chicago-čujuhus (17. p.)Agrawal, V. K. Simplified Course in Ecology and Ethology. 1st. ed. New Delhi: S. Chand & Company Ltd., 2002.
MLA-čujuhus (9. p.)Agrawal, V. K. Simplified Course in Ecology and Ethology. 1st. ed. S. Chand & Company Ltd., 2002.
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