| APA | Smart Define. (1970). internal-combustion engines thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/internal-combustion_engines/thesaurus/synonyms |
| Chicago | Smart Define. 1970. "internal-combustion engines thesaurus" https://smartdefine.org/internal-combustion_engines/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 1970, internal-combustion engines thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/internal-combustion_engines/thesaurus/synonyms>. |
| MLA | Smart Define. "internal-combustion engines thesaurus" 1 January 1970. Web. 26 September 2026. <https://smartdefine.org/internal-combustion_engines/thesaurus/synonyms> |