Singapore Council of Social Service. (1979). Social service directory ([2d ed.].). Singapore Council of Social Service.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSingapore Council of Social Service. Social Service Directory. [2d ed.]. Singapore: Singapore Council of Social Service, 1979.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSingapore Council of Social Service. Social Service Directory. [2d ed.]. Singapore Council of Social Service, 1979.
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