| APA | Smart Define. (2013). per tonne thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/per_tonne/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "per tonne thesaurus" https://smartdefine.org/per_tonne/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2013, per tonne thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/per_tonne/thesaurus/synonyms>. |
| MLA | Smart Define. "per tonne thesaurus" 18 May 2013. Web. 24 September 2026. <https://smartdefine.org/per_tonne/thesaurus/synonyms> |