Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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