Chicago: Aristotle, "Book I," Nicomachean Ethics, trans. W. D. Ross Original Sources, accessed December 11, 2019, http://originalsources.com/Document.aspx?DocID=2XEPV13RSINXQIA.
MLA: Aristotle. "Book I." Nicomachean Ethics, translted by W. D. Ross, Original Sources. 11 Dec. 2019. originalsources.com/Document.aspx?DocID=2XEPV13RSINXQIA.
Harvard: Aristotle, 'Book I' in Nicomachean Ethics, trans. . Original Sources, retrieved 11 December 2019, from http://originalsources.com/Document.aspx?DocID=2XEPV13RSINXQIA.