APA (7th ed.) Zitazioa

Sharma, P. D. (2013). Ecology and environment (11th rev. ed.). Rastogi Publications.

Chicago Style (17th ed.) Zitazioa

Sharma, P. D. Ecology and Environment. 11th rev. ed. Meerut: Rastogi Publications, 2013.

MLA (9th ed.) Zitazioa

Sharma, P. D. Ecology and Environment. 11th rev. ed. Rastogi Publications, 2013.