Chicago: Aristotle, "Book I," On the Heavens, trans. J. L. Stocks Original Sources, accessed April 23, 2024, http://www.originalsources.com/Document.aspx?DocID=1NJHNZHNRFKQLC3.
MLA: Aristotle. "Book I." On the Heavens, translted by J. L. Stocks, Original Sources. 23 Apr. 2024. http://www.originalsources.com/Document.aspx?DocID=1NJHNZHNRFKQLC3.
Harvard: Aristotle, 'Book I' in On the Heavens, trans. . Original Sources, retrieved 23 April 2024, from http://www.originalsources.com/Document.aspx?DocID=1NJHNZHNRFKQLC3.