Παραπομπή APA

Krisha De , A. (1998). Sustainable development and environment. Cosmo Publications.

Παραπομπή Chicago Style

Krisha De , Amit. Sustainable Development and Environment. New Delhi: Cosmo Publications, 1998.

Παραπομπή MLA

Krisha De , Amit. Sustainable Development and Environment. Cosmo Publications, 1998.