Singapore. Centre for Liveable Cities & Singapore. National Environmental Agency. (2013). Sustainable environment: Balancing growth with the environment. Cengage Learning Asia Pte Ltd.
Chicago-referens (17:e uppl.)Singapore. Centre for Liveable Cities och Singapore. National Environmental Agency. Sustainable Environment: Balancing Growth with the Environment. Singapore: Cengage Learning Asia Pte Ltd, 2013.
MLA-referens (9:e uppl.)Singapore. Centre for Liveable Cities och Singapore. National Environmental Agency. Sustainable Environment: Balancing Growth with the Environment. Cengage Learning Asia Pte Ltd, 2013.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.