Não informado. (1958). Journal of tropical geography. University of Singapore, Department of Geography.
Chicago-referens (17:e uppl.)Não informado. Journal of Tropical Geography. Singapore: University of Singapore, Department of Geography, 1958.
MLA-referens (8:e uppl.)Não informado. Journal of Tropical Geography. University of Singapore, Department of Geography, 1958.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.