| APA | Smart Define. (-0001). National Examination Board in Occupational Safety and Health thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/national_examination_board_in_occupational_safety_and_health/thesaurus/broader |
| Chicago | Smart Define. -0001. "National Examination Board in Occupational Safety and Health thesaurus" https://smartdefine.org/national_examination_board_in_occupational_safety_and_health/thesaurus/broader (accessed September 30, 2026). |
| Harvard | Smart Define -0001, National Examination Board in Occupational Safety and Health thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/national_examination_board_in_occupational_safety_and_health/thesaurus/broader>. |
| MLA | Smart Define. "National Examination Board in Occupational Safety and Health thesaurus" 30 November -0001. Web. 30 September 2026. <https://smartdefine.org/national_examination_board_in_occupational_safety_and_health/thesaurus/broader> |