Library of Congress. Photoduplication Service. (1980). Specifications for microfilming manuscripts. Library of Congress.
芝加哥风格引文Library of Congress. Photoduplication Service. Specifications for Microfilming Manuscripts. Washington, D.C.: Library of Congress, 1980.
MLA引文Library of Congress. Photoduplication Service. Specifications for Microfilming Manuscripts. Library of Congress, 1980.
警告：这些引文格式不一定是100％准确.