Cita APA (7a ed.)

Library of Congress, University of North Carolina (1793-1962), Jenkins, W. S., & Hamrick, L. A. (1950). A Guide to the microfilm collection of early state records. Library of Congress, Photoduplication Service.

Cita Chicago Style (17a ed.)

Library of Congress, University of North Carolina (1793-1962), William Sumner Jenkins, y Lillian A. Hamrick. A Guide to the Microfilm Collection of Early State Records. [Washington, D.C.]: Library of Congress, Photoduplication Service, 1950.

Cita MLA (8a ed.)

Library of Congress, et al. A Guide to the Microfilm Collection of Early State Records. Library of Congress, Photoduplication Service, 1950.