Ling, O. G. (2005). Sustainability and cities: Concept and assessment. Institute of Policy Studies ; World Scientific Publishing Co. Pte. Ltd..
Chicago Style aipamenaLing, Ooi Giok. Sustainability and Cities: Concept and Assessment. Singapore : Singapore: Institute of Policy Studies ; World Scientific Publishing Co. Pte. Ltd., 2005.
MLA aipamenaLing, Ooi Giok. Sustainability and Cities: Concept and Assessment. Institute of Policy Studies ; World Scientific Publishing Co. Pte. Ltd., 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.