Singapore. Centre for Liveable Cities & Singapore. National Environmental Agency. (2013). Sustainable environment: Balancing growth with the environment. Cengage Learning Asia Pte Ltd.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSingapore. Centre for Liveable Cities और Singapore. National Environmental Agency. Sustainable Environment: Balancing Growth with the Environment. Singapore: Cengage Learning Asia Pte Ltd, 2013.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSingapore. Centre for Liveable Cities और Singapore. National Environmental Agency. Sustainable Environment: Balancing Growth with the Environment. Cengage Learning Asia Pte Ltd, 2013.
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