Cita APA (7th ed.)

Douglas, I., & Spencer, T. (1982). Applied geomorphology in the tropics. Gebruder Borntraeger.

Cita Chicago (17th ed.)

Douglas, Ian, i Tom Spencer. Applied Geomorphology in the Tropics. Berlin: Gebruder Borntraeger, 1982.

Cita MLA (9th ed.)

Douglas, Ian, i Tom Spencer. Applied Geomorphology in the Tropics. Gebruder Borntraeger, 1982.