| APA | Smart Define. (-0001). national board of boiler and pressure vessel inspectors thesaurus. Retrieved October 2, 2026, from https://smartdefine.org/national_board_of_boiler_and_pressure_vessel_inspectors/thesaurus/broader |
| Chicago | Smart Define. -0001. "national board of boiler and pressure vessel inspectors thesaurus" https://smartdefine.org/national_board_of_boiler_and_pressure_vessel_inspectors/thesaurus/broader (accessed October 2, 2026). |
| Harvard | Smart Define -0001, national board of boiler and pressure vessel inspectors thesaurus, Smart Define, viewed 2 October, 2026, <https://smartdefine.org/national_board_of_boiler_and_pressure_vessel_inspectors/thesaurus/broader>. |
| MLA | Smart Define. "national board of boiler and pressure vessel inspectors thesaurus" 30 November -0001. Web. 2 October 2026. <https://smartdefine.org/national_board_of_boiler_and_pressure_vessel_inspectors/thesaurus/broader> |