APA (7th ed.) Zitazioa

(2006). Abstracts. 18th World congress of soil science (July 9-15, 2006, Philadelphia).

Chicago Style (17th ed.) Zitazioa

Abstracts. 18th World Congress of Soil Science (July 9-15, 2006, Philadelphia). 2006.

MLA (9th ed.) Zitazioa

Abstracts. 18th World Congress of Soil Science (July 9-15, 2006, Philadelphia). 2006.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.