Manahan, G. V. (1998). Ecology, humans and the geography of the environment (second of two parts). Philippine Architects' Journal.
Chicago Style aipamenaManahan, Geronimo V. "Ecology, Humans and the Geography of the Environment (second of Two Parts)." Philippine Architects' Journal 1998.
MLA aipamenaManahan, Geronimo V. "Ecology, Humans and the Geography of the Environment (second of Two Parts)." Philippine Architects' Journal, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.