| APA | Smart Define. (1970). lonely-heart advertisement thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/lonely-heart_advertisement/thesaurus/broader |
| Chicago | Smart Define. 1970. "lonely-heart advertisement thesaurus" https://smartdefine.org/lonely-heart_advertisement/thesaurus/broader (accessed September 20, 2026). |
| Harvard | Smart Define 1970, lonely-heart advertisement thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/lonely-heart_advertisement/thesaurus/broader>. |
| MLA | Smart Define. "lonely-heart advertisement thesaurus" 1 January 1970. Web. 20 September 2026. <https://smartdefine.org/lonely-heart_advertisement/thesaurus/broader> |