APA (7th ed.) Zitazioa

SHARMA, P. (1975). Elements of Ecology (1st.). Rastogi Publication.

Chicago Style (17th ed.) Zitazioa

SHARMA, P.D. Elements of Ecology. 1st. Meerut: Rastogi Publication, 1975.

MLA (9th ed.) Zitazioa

SHARMA, P.D. Elements of Ecology. 1st. Rastogi Publication, 1975.