APA aipamena

Ashok Kumar. (2012). Aquatic ecosystem. Discovery.

Chicago Style aipamena

Ashok Kumar. Aquatic Ecosystem. Darya Ganj: Discovery, 2012.

MLA aipamena

Ashok Kumar. Aquatic Ecosystem. Discovery, 2012.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.