Não informado. (1980). Singapore journal of tropical geography. National University od Singapore, Department of Geography.
Chicago-referens (17:e uppl.)Não informado. Singapore Journal of Tropical Geography. Singapore: National University od Singapore, Department of Geography, 1980.
MLA-referens (8:e uppl.)Não informado. Singapore Journal of Tropical Geography. National University od Singapore, Department of Geography, 1980.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.