Cita APA (7a ed.)

Irving, R. D., & Katz, B. (1988). Reference services and public policy. Haworth.

Cita Chicago Style (17a ed.)

Irving, Richard D., y Bill Katz. Reference Services and Public Policy. New York [etc.]: Haworth, 1988.

Cita MLA (9a ed.)

Irving, Richard D., y Bill Katz. Reference Services and Public Policy. Haworth, 1988.