HENG, T. M. (1990). An Economic Framework Of Singapore Principles And Issues Toh Mun Heng, Linda Low. McGraw-Hill.
Chicago-referens (17:e uppl.)HENG, Toh Mun. An Economic Framework Of Singapore Principles And Issues Toh Mun Heng, Linda Low. McGraw-Hill, 1990.
MLA-referens (8:e uppl.)HENG, Toh Mun. An Economic Framework Of Singapore Principles And Issues Toh Mun Heng, Linda Low. McGraw-Hill, 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.