Cita APA (7a ed.)

Library of Congress. & Schwegmann, G. A. (1961). Newspapers on microfilm (4th ed.). Library of Congress.

Cita Chicago Style (17a ed.)

Library of Congress. y George A. Schwegmann. Newspapers on Microfilm. 4th ed. Washington: Library of Congress, 1961.

Cita MLA (9a ed.)

Library of Congress. y George A. Schwegmann. Newspapers on Microfilm. 4th ed. Library of Congress, 1961.