APA aipamena

TYAGI, V. &. G. &. C. (2016). ENVIRONMENTAL STUDIES - BOOK 1. PROQUEST.

Chicago Style aipamena

TYAGI, VEENA & GOSWAMY & CHOWDHURY. ENVIRONMENTAL STUDIES - BOOK 1. NEW DELHI: PROQUEST, 2016.

MLA aipamena

TYAGI, VEENA & GOSWAMY & CHOWDHURY. ENVIRONMENTAL STUDIES - BOOK 1. PROQUEST, 2016.