APA (7th ed.) Zitazioa

Valls y Taberner, F. (1990). An introductory history of discovery and exploration. University of Málaga.

Chicago Style (17th ed.) Zitazioa

Valls y Taberner, Fernando. An Introductory History of Discovery and Exploration. Zaragoza: University of Málaga, 1990.

MLA (9th ed.) Zitazioa

Valls y Taberner, Fernando. An Introductory History of Discovery and Exploration. University of Málaga, 1990.