| APA | Smart Define. (1970). extensions to the international phonetic alphabet thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/extensions_to_the_international_phonetic_alphabet/thesaurus/related |
| Chicago | Smart Define. 1970. "extensions to the international phonetic alphabet thesaurus" https://smartdefine.org/extensions_to_the_international_phonetic_alphabet/thesaurus/related (accessed September 30, 2026). |
| Harvard | Smart Define 1970, extensions to the international phonetic alphabet thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/extensions_to_the_international_phonetic_alphabet/thesaurus/related>. |
| MLA | Smart Define. "extensions to the international phonetic alphabet thesaurus" 1 January 1970. Web. 30 September 2026. <https://smartdefine.org/extensions_to_the_international_phonetic_alphabet/thesaurus/related> |