Statistical map of the United States of America Prepared by James S. Cowdon and James D. Holman, Special Statisticians, under the direction of the Hon. John C. Black, Commissioner of Pensions.
MLA
Cowdon, James S. Statistical Map of the United States of America Prepared by James S. Cowdon and James D. Holman, Special Statisticians, under the Direction of the Hon. John C. Black, Commissioner of Pensions. M. Joyce, Eng., 1888. https://collections.library.yale.edu/catalog/15603710.
APA, 6th edition
Cowdon, J. S. (1888). Statistical map of the United States of America Prepared by James S. Cowdon and James D. Holman, Special Statisticians, under the direction of the Hon. John C. Black, Commissioner of Pensions. [Maps]. M. Joyce, Eng. https://collections.library.yale.edu/catalog/15603710.
