Library of Congress. General Reference and Bibliography Division & McCrum, B. P. (1950). Microfilms and microcards: Their use in research; a selected list of references.
Chicago Style (17th ed.) CitationLibrary of Congress. General Reference and Bibliography Division and Blanche Prichard McCrum. Microfilms and Microcards: Their Use in Research; a Selected List of References. Washington, 1950.
MLA (8th ed.) CitationLibrary of Congress. General Reference and Bibliography Division and Blanche Prichard McCrum. Microfilms and Microcards: Their Use in Research; a Selected List of References. 1950.
Warning: These citations may not always be 100% accurate.