APA (7th ed.) Zitazioa

Joseph J. Hobbs. (2017). Fundamental of World Regional Geography (4th ed.). Cengage.

Chicago Style (17th ed.) Zitazioa

Joseph J. Hobbs. Fundamental of World Regional Geography. 4th ed. Singapore: Cengage, 2017.

MLA (9th ed.) Zitazioa

Joseph J. Hobbs. Fundamental of World Regional Geography. 4th ed. Cengage, 2017.