Cita APA (7a ed.)

Library of Congress. Photoduplication Service. (1990). Specifications for microfilming manuscripts. Library of Congress.

Cita Chicago Style (17a ed.)

Library of Congress. Photoduplication Service. Specifications for Microfilming Manuscripts. Washington: Library of Congress, 1990.

Cita MLA (9a ed.)

Library of Congress. Photoduplication Service. Specifications for Microfilming Manuscripts. Library of Congress, 1990.