Não informado. (1980). Singapore journal of tropical geography. National University od Singapore, Department of Geography.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Singapore Journal of Tropical Geography. Singapore: National University od Singapore, Department of Geography, 1980.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Singapore Journal of Tropical Geography. National University od Singapore, Department of Geography, 1980.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.