| APA | Smart Define. (1970). symphony of horror thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/symphony_of_horror/thesaurus/synonyms |
| Chicago | Smart Define. 1970. "symphony of horror thesaurus" https://smartdefine.org/symphony_of_horror/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 1970, symphony of horror thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/symphony_of_horror/thesaurus/synonyms>. |
| MLA | Smart Define. "symphony of horror thesaurus" 1 January 1970. Web. 29 September 2026. <https://smartdefine.org/symphony_of_horror/thesaurus/synonyms> |