Hoy, D. R. (1978). Essentials of geography and development: Concepts and processes. Macmillan.
Cita Chicago (17th ed.)Hoy, Don R. Essentials of Geography and Development: Concepts and Processes. New York: Macmillan, 1978.
Cita MLA (9th ed.)Hoy, Don R. Essentials of Geography and Development: Concepts and Processes. Macmillan, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.