Explanation of the Wheel of Sevens

Chicago citation style
Explanation of the Wheel of Sevens. 1275 - 1299. Retrieved from the Digital Public Library of America, http://libwww.freelibrary.org/diglib/searchItem.cfm?itemID=mca249001b. (Accessed December 18, 2018.)
APA citation style
(1275 - 1299) Explanation of the Wheel of Sevens. Retrieved from the Digital Public Library of America, http://libwww.freelibrary.org/diglib/searchItem.cfm?itemID=mca249001b
MLA citation style
Retrieved from the Digital Public Library of America <http://libwww.freelibrary.org/diglib/searchItem.cfm?itemID=mca249001b>.
Note: These citations are programmatically generated and may be incomplete.