Manahan, G. V. (1998). Ecology, humans and the geography of the environment (second of two parts). Philippine Architects' Journal.
Chicago-referens (17:e uppl.)Manahan, Geronimo V. "Ecology, Humans and the Geography of the Environment (second of Two Parts)." Philippine Architects' Journal 1998.
MLA-referens (9:e uppl.)Manahan, Geronimo V. "Ecology, Humans and the Geography of the Environment (second of Two Parts)." Philippine Architects' Journal, 1998.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.