Ministry of Manpower  Singapore Medical Association
 Ministry of Health  Singapore Institution of Safety Officers
 Workplace Safety and Health Institute  National Environmental Agency
 Workplace Safety and Health (WSH) Council  Workplace Health Kit
 Ministry of Environment and Water Resources
 Singapore Statutes Online
 Health and Safety Executive(UK)  Finnish Institute of Occupational Health
 Occupational Health And Safety (USA)  Swedish Work Environment Authority
 National Institute of  Occupational Health and Safety (USA)  Work Improvement Network Asia
 Canadian Centre for Occupational Health and Safety  Occupational Safety and Health Service (New Zealand)
 Safe Work Australia  Ministry of Health, Labour and Welfare (Japan)
 International Labour Organisation  World Health Organisation
 International Occupational Hygiene Association (IOHA)  American Industrial Hygiene Association (AIHA)
 American Conference of Industrial Hygienists (ACGIH)  British Occupational Hygiene Society (BOHS)