APA Edition Citation

Iqbal, S. A., & Sethi, M. S. Encyclopaedia of nature and environment.

Chicago Edition Citation

Iqbal, S A., and M S. Sethi. Encyclopaedia of Nature and Environment. New Delhi, Discovery Publishing.

MLA Edition Citation

Iqbal, S A., and M S. Sethi. Encyclopaedia of Nature and Environment.

Warning: These citations may not always be 100% accurate.