Xerox University Microfilms. (1973). Comprehensive dissertation index, 1861-1972. Xerox University Microfilms.
Cita Chicago Style (17a ed.)Xerox University Microfilms. Comprehensive Dissertation Index, 1861-1972. Ann Arbor, Michigan: Xerox University Microfilms, 1973.
Cita MLA (9a ed.)Xerox University Microfilms. Comprehensive Dissertation Index, 1861-1972. Xerox University Microfilms, 1973.
Precaución: Estas citas no son 100% exactas.
