APA (7th ed.) Zitazioa

Welch, P. S. (2009). Limnological methods. Narendra Pub..

Chicago Style (17th ed.) Zitazioa

Welch, Paul S. Limnological Methods. Delhi: Narendra Pub., 2009.

MLA (9th ed.) Zitazioa

Welch, Paul S. Limnological Methods. Narendra Pub., 2009.