HENG, T. M. (1990). An Economic Framework Of Singapore Principles And Issues Toh Mun Heng, Linda Low. McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHENG, Toh Mun. An Economic Framework Of Singapore Principles And Issues Toh Mun Heng, Linda Low. McGraw-Hill, 1990.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHENG, Toh Mun. An Economic Framework Of Singapore Principles And Issues Toh Mun Heng, Linda Low. McGraw-Hill, 1990.
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