APA (7th ed.) Zitazioa

Arnaud Gerkens, J. (1989). Foundation of exploration geographics. Elsevier.

Chicago Style (17th ed.) Zitazioa

Arnaud Gerkens, J..C.d. Foundation of Exploration Geographics. New York: Elsevier, 1989.

MLA (9th ed.) Zitazioa

Arnaud Gerkens, J..C.d. Foundation of Exploration Geographics. Elsevier, 1989.