↑"Euthanasia". Worldrtd.net. เก็บจากแหล่งเดิมเมื่อ 5 August 2017. สืบค้นเมื่อ 2017-07-06. Philosopher Helga Kuhse: "'Euthanasia' is a compound of two Greek words – eu and thanatos meaning, literally, 'a good death'. Today, 'euthanasia' is generally understood to mean the bringing about of a good death – 'mercy killing,' where one person, A, ends the life of another person, B, for the sake of B."
↑"Voluntary Euthanasia". Voluntary Euthanasia (Stanford Encyclopedia of Philosophy). Plato.stanford.edu. Metaphysics Research Lab, Stanford University. 2018. สืบค้นเมื่อ 2019-05-07. When a person performs an act of euthanasia, she brings about the death of another person because she believes the latter's present existence is so bad that he would be better off dead, or believes that unless she intervenes and ends his life, his life will very soon become so bad that he would be better off dead.