APA (7th ed.) Citation

Great Britain. Health and Safety Executive. (1989). Essentials of health and safety at work. H.M.S.O.

Chicago Style (17th ed.) Citation

Great Britain. Health and Safety Executive. Essentials of Health and Safety at Work. London: H.M.S.O, 1989.

MLA (9th ed.) Citation

Great Britain. Health and Safety Executive. Essentials of Health and Safety at Work. H.M.S.O, 1989.