APA (7th ed.) Zitazioa

Welch, P. S. (1948). Limnological methods. McGraw-Hill.

Chicago Style (17th ed.) Zitazioa

Welch, Paul S. Limnological Methods. New York, USA: McGraw-Hill, 1948.

MLA (9th ed.) Zitazioa

Welch, Paul S. Limnological Methods. McGraw-Hill, 1948.