APA (7th ed.) Zitazioa
Head, K. H., & Epps, R. J. (2011). Manual of soil laboratory testing (Third edition.). Whittles Publishing.
Chicago Style (17th ed.) Zitazioa
Head, K. H., eta R. J. Epps. Manual of Soil Laboratory Testing. Third edition. Dunbeath, Scotland: Whittles Publishing, 2011.
MLA (9th ed.) Zitazioa
Head, K. H., eta R. J. Epps. Manual of Soil Laboratory Testing. Third edition. Whittles Publishing, 2011.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.