Information bulletin number 4

Chicago citation style
Information bulletin number 4. 1942-01-20. Retrieved from the Digital Public Library of America, http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll18/id/637. (Accessed October 20, 2018.)
APA citation style
(1942-01-20) Information bulletin number 4. Retrieved from the Digital Public Library of America, http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll18/id/637
MLA citation style
Retrieved from the Digital Public Library of America <http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll18/id/637>.
Note: These citations are programmatically generated and may be incomplete.