Holt, S. (1964). World geography and you. Van Nostrand.
Cita Chicago (17th ed.)Holt, Sol. World Geography and You. London: Van Nostrand, 1964.
Cita MLA (9th ed.)Holt, Sol. World Geography and You. Van Nostrand, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.