APA (7th ed.) Zitazioa

Gelinas, P. J., & Scharff, R. (1967). Geography of the world: For young readers. Collins.

Chicago Style (17th ed.) Zitazioa

Gelinas, Paul J., eta Robert Scharff. Geography of the World: For Young Readers. London: Collins, 1967.

MLA (9th ed.) Zitazioa

Gelinas, Paul J., eta Robert Scharff. Geography of the World: For Young Readers. Collins, 1967.