Taylor, John K. (John Keenan), 1912-, Stanley, T. W. (Thomas W.), American Society for Testing and Materials. Committee D-19 on Water, ASTM. Committee D-22 on Sampling and Analysis of Atmospheres, Conference on Quality Assurance for Environmental Measurements (1983 : Boulder, Colo.)

ASEAN Quality Assurance Agencies Roundtable Meeting 2008

Seminar on Quality Assurance in Environmental Impact Assessment (1993 : Kuala Lumpur)

Workshop on Quality Assurance Considerations and Technical Procedures of Site Selection for Nuclear Power Plant (1992 : Kuala Lumpur), International Atomic Energy Agency, Tenaga Nasional Berhad

Conference on Quality Assurance for the Chief Executive (1989 : London), Institution of Civil Engineers (Great Britain)

One Day Seminar on Quality Assurance in the Marine and Offshore Industry (1986 : Singapore)

Mohamed Khalil Mohd. Hani, Chia, Yew Hoong, Malaysian Science and Technology Congress (1997 : Johor Bahru)

Quality Assurance Conference (13th : 1973 : Oxford), MacGregor, Alan G.

Middle East International Quality Assurance Conference (3rd : 1995 : Bahrain), The Bahrain Society of Engineers (BSE), Institute of Quality Assurance ( Great Britain)