APA (7th ed.) Zitazioa

(1997). Main types of geological maps purpose, use and preparation. Oxford.

Chicago Style (17th ed.) Zitazioa

Main Types of Geological Maps Purpose, Use and Preparation. New Delhi: Oxford, 1997.

MLA (9th ed.) Zitazioa

Main Types of Geological Maps Purpose, Use and Preparation. Oxford, 1997.