Ferrett, E. (2022). International health and safety at work revision guide: For the NEBOSH international general certificate in occupational health and safety (Third edition.). Routledge, Taylor & Francis Group.
Lua i Stíl Chicago (17ú heag.)Ferrett, Ed. International Health and Safety at Work Revision Guide: For the NEBOSH International General Certificate in Occupational Health and Safety. Third edition. London ; New York: Routledge, Taylor & Francis Group, 2022.
Lua MLA (9ú heag.)Ferrett, Ed. International Health and Safety at Work Revision Guide: For the NEBOSH International General Certificate in Occupational Health and Safety. Third edition. Routledge, Taylor & Francis Group, 2022.
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