Galen (1916). Galen On the Natural Faculties(en inglés). W. Heinemann. p. 3. «In this work, Galen does not specifically in one place state the quote mentioned by Edward Lane; however, in the first chapter of Natural Faculties he discusses the difference between plants and animals. Plants only have a physical body, while animals have both a physical body and soul. The body is fed by physical nutrients, such as bread, while the soul is fed by the senses. In this treatise, he studies the aspects of the physical body.»
Tongier, Mae Gutherie (March 1910). Sick and Lost His Grip(en inglés). Vol. III, No. 14. The Progressive Woman. p. 15.
The Playground. Executive Committee of the Playground Association of America. 1923. p. 435.
groups.google.com
´ (10 de marzo de 1999). "Re: Happy!; Bread and Roses". rec.music.folk. (Google Groups). URL accedida el 18 de febrero de 2014.
´ (11 de marzo de 1999). "Re: Happy!; Bread and Roses". rec.music.folk. (Google Groups). URL accedida el 18 de febrero de 2014.
gutenberg.org
Lane, Edward William (1883). Arabian Society In The Middle Ages Studies From The Thousand And One Nights. London. «The quote comes via Arabic translation from the book Ḥalbet El-Kumeyt which was written by Shems-ed-deen Moḥammad En-Nowwájee († 1454) who attributes the quote to Galen. See pp. 167 (footnote 195), pp. 283».
Lane, Edward William (1883). Arabian Society In The Middle Ages Studies From The Thousand And One Nights. London. «The quote comes via Arabic translation from the book Ḥalbet El-Kumeyt which was written by Shems-ed-deen Moḥammad En-Nowwájee († 1454) who attributes the quote to Galen. See pp. 167 (footnote 195), pp. 283».
