The National cyclopaedia of American biography, being the history of the United States.
MLA
The National Cyclopaedia of American Biography, Being the History of the United States. University Microfilms, 1967. https://collections.library.yale.edu/catalog/16580273.
APA, 6th edition
The National cyclopaedia of American biography, being the history of the United States. (1967). [Portraits]. University Microfilms, https://collections.library.yale.edu/catalog/16580273.