Cita APA (7th ed.)

Gourou, P. (1958). The tropical world: Its social and economic conditions and its future status ([2nd ed.].). Longmans.

Cita Chicago (17th ed.)

Gourou, Pierre. The Tropical World: Its Social and Economic Conditions and Its Future Status. [2nd ed.]. London: Longmans, 1958.

Cita MLA (9th ed.)

Gourou, Pierre. The Tropical World: Its Social and Economic Conditions and Its Future Status. [2nd ed.]. Longmans, 1958.