First day of issue cover featuring a stamp of the Space Needle at the Seattle World's Fair, 1962

Chicago citation style
Unknown. First day of issue cover featuring a stamp of the Space Needle at the Seattle World's Fair, 1962. 1962. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/ptec/id/3653. (Accessed June 25, 2018.)
APA citation style
Unknown, (1962) First day of issue cover featuring a stamp of the Space Needle at the Seattle World's Fair, 1962. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/ptec/id/3653
MLA citation style
Unknown. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/ptec/id/3653>.
Note: These citations are programmatically generated and may be incomplete.