There's a green hill out in Flanders : (there's a green hill up in Maine)

Chicago citation style
Flynn, Allan J, Flynn, Allan J. There's a green hill out in Flanders : (there's a green hill up in Maine). 1917. Retrieved from the Digital Public Library of America, http://www.idaillinois.org/cdm/ref/collection/p16614coll23/id/540. (Accessed December 13, 2018.)
APA citation style
Flynn, Allan J, Flynn, Allan J, (1917) There's a green hill out in Flanders : (there's a green hill up in Maine). Retrieved from the Digital Public Library of America, http://www.idaillinois.org/cdm/ref/collection/p16614coll23/id/540
MLA citation style
Flynn, Allan J, Flynn, Allan J. Retrieved from the Digital Public Library of America <http://www.idaillinois.org/cdm/ref/collection/p16614coll23/id/540>.
Note: These citations are programmatically generated and may be incomplete.