Παραπομπή APA

Sudha Singh. (2011). Paryavaran shiksha. Lokbharati.

Παραπομπή Chicago Style

Sudha Singh. Paryavaran Shiksha. Alahabad: Lokbharati, 2011.

Παραπομπή MLA

Sudha Singh. Paryavaran Shiksha. Lokbharati, 2011.