APA (7th ed.) Citation

Library of Congress. Federal Research Division, Ofcansky, T. P., & Berry, L. B. (1991). Ethiopia: A country study. Federal Research Division.

Chicago Style (17th ed.) Citation

Library of Congress. Federal Research Division, Thomas P. Ofcansky, and LaVerle Bennette Berry. Ethiopia: A Country Study. Washington, D.C.: Federal Research Division, 1991.

MLA (9th ed.) Citation

Library of Congress. Federal Research Division, et al. Ethiopia: A Country Study. Federal Research Division, 1991.