| APA | Smart Define. (2011). Enea Silvio Piccolomini thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/enea_silvio_piccolomini/thesaurus/synonyms |
| Chicago | Smart Define. 2011. "Enea Silvio Piccolomini thesaurus" https://smartdefine.org/enea_silvio_piccolomini/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2011, Enea Silvio Piccolomini thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/enea_silvio_piccolomini/thesaurus/synonyms>. |
| MLA | Smart Define. "Enea Silvio Piccolomini thesaurus" 26 April 2011. Web. 26 September 2026. <https://smartdefine.org/enea_silvio_piccolomini/thesaurus/synonyms> |