Keep 'em flying!

Chicago citation style
Keep 'em flying!. Retrieved from the Digital Public Library of America, http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll18/id/250. (Accessed October 21, 2018.)
APA citation style
Keep 'em flying!. Retrieved from the Digital Public Library of America, http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll18/id/250
MLA citation style
Retrieved from the Digital Public Library of America <http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll18/id/250>.
Note: These citations are programmatically generated and may be incomplete.