| APA | Smart Define. (1970). historical province of Ulster thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/historical_province_of_ulster/thesaurus/narrower |
| Chicago | Smart Define. 1970. "historical province of Ulster thesaurus" https://smartdefine.org/historical_province_of_ulster/thesaurus/narrower (accessed October 1, 2026). |
| Harvard | Smart Define 1970, historical province of Ulster thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/historical_province_of_ulster/thesaurus/narrower>. |
| MLA | Smart Define. "historical province of Ulster thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/historical_province_of_ulster/thesaurus/narrower> |