1. Trends in cancer incidence in Singapore 1968-1992, Singapore Cancer Registry Report No. 4. Singapore: Singapore Cancer Registry. 1996. 1-217.
2. Cancer incidence in Singapore, 1993-1997, Singapore Cancer Registry Report No. 5. Singapore: Singapore Cancer Registry, 2000. 1-161.
3. Singapore Department of Statistics. Singapore census of population 1990, statistical release 1: demographic characteristics. Singapore: Singapore Department of Statistics, 1991. 1-159.
4. From colony to city state: changes in health needs in Singapore from 1950 to 1990
5. Health care systems in transition II. Singapore, Part I. An overview of health care systems in Singapore