| APA | Smart Define. (-0001). Penny-farthing thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/penny-farthing/thesaurus/synonyms |
| Chicago | Smart Define. -0001. "Penny-farthing thesaurus" https://smartdefine.org/penny-farthing/thesaurus/synonyms (accessed October 1, 2026). |
| Harvard | Smart Define -0001, Penny-farthing thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/penny-farthing/thesaurus/synonyms>. |
| MLA | Smart Define. "Penny-farthing thesaurus" 30 November -0001. Web. 1 October 2026. <https://smartdefine.org/penny-farthing/thesaurus/synonyms> |