(1980). Essentials of Geography and development: Concepts and processes. Macmillan.
Čikaški stil citiranja (17. izdanje)Essentials of Geography and Development: Concepts and Processes. New York: Macmillan, 1980.
MLA način citiranja (9. izdanje)Essentials of Geography and Development: Concepts and Processes. Macmillan, 1980.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.