APA (7th ed.) Zitazioa

Johnson, L. E. Geographic information systems in water resources engineering.

Chicago Style (17th ed.) Zitazioa

Johnson, Lynn E. Geographic Information Systems in Water Resources Engineering.

MLA (9th ed.) Zitazioa

Johnson, Lynn E. Geographic Information Systems in Water Resources Engineering.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.