World plotting series / published jointly by the Central Intelligence Agency and the Defense Mapping Agency, Topographic Center.

Chicago citation style
United States. Central Intelligence Agency. World plotting series / published jointly by the Central Intelligence Agency and the Defense Mapping Agency, Topographic Center.. 1976. Retrieved from the Digital Public Library of America, http://digital.libraries.psu.edu/cdm/ref/collection/maps1/id/6708. (Accessed December 11, 2018.)
APA citation style
United States. Central Intelligence Agency, (1976) World plotting series / published jointly by the Central Intelligence Agency and the Defense Mapping Agency, Topographic Center.. Retrieved from the Digital Public Library of America, http://digital.libraries.psu.edu/cdm/ref/collection/maps1/id/6708
MLA citation style
United States. Central Intelligence Agency. Retrieved from the Digital Public Library of America <http://digital.libraries.psu.edu/cdm/ref/collection/maps1/id/6708>.
Note: These citations are programmatically generated and may be incomplete.