Παραπομπή APA

Sudarshana Sharma & Vinit Kumar. (2013). Environmental science: A sustainable approach. Shree publishers.

Παραπομπή Chicago Style

Sudarshana Sharma και Vinit Kumar. Environmental Science: A Sustainable Approach. New Delhi: Shree publishers, 2013.

Παραπομπή MLA

Sudarshana Sharma και Vinit Kumar. Environmental Science: A Sustainable Approach. Shree publishers, 2013.