Kompas, 08 November 2007. Eropah mengimpor 70% protein (kedelai, jagung, gandum) dari produksi pertanian untuk peternakan.
Kompas, 21 Agustus 2020. Sains, lingkungan & kesehatan: Pembangunan rendah karbon, penurunan emisi tetap prioritas.
McGrath, M. (2020). https://www.bbc.com/news/science-environment-52485712
Ornish, D. et al (1998). Intensive lifestyle changes for reversal coronary heart disease, dalam JAMA 1998: 280 (230: 2001-2007)
Satwiko, P. (2012). Saya vegan. Yogyakarta: Penerbit Kanisius.
     http://jamanetwork.com/journals/jama/fullarticle/188274
Susianto, et al (2008). Diet enak ala vegetarian. Jakarta: Penebar Plus.
Tan, C. (2021). https://www.facebook.com/notes/dee-lestari/bumi-kita-butuh-langkah-cepat-please-go veggie/83997613388
United Nation -- Food and Agricultural Organization (UN-FAO) (2006). Livestock's long shadow. http://en.wikipedia.org/wiki/Livestock%27s-Long_Shadow
UN-FAO Newsroom (2006). Livestock is a major threat to the environment.
     http://www.fao.org/newsroom/en/news/2006/1000448/index.html
