クルエルティフリー
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↑ Caroline Frost (15 March 2012), “Ricky Gervais Fronts Cruelty Free International Crusade To End Cosmetic Tests On Animals”, Huffington Post, http://www.huffingtonpost.co.uk/2012/03/15/ricky-gervais-cruelty-free-international-cosmetic-tests-animals_n_1347035.html
↑ “Animal Tests & Alternatives”. Cruelty Free International. 2013年3月30日閲覧。
↑ Gallagher, Megan Erin (2003). Toxicity Testing Requirements, Methods and Proposed Alternatives. California: environs environmental law and policy journal. p. 253
↑ Curren, Roger (Nov–Dec 2000).