Cita APA (7a ed.)

Willoughby, T. C. (1971). Proceedings of the ninth annual SIGCPR conference. Association for Computing Machinery.

Cita Chicago Style (17a ed.)

Willoughby, Theodore C. Proceedings of the Ninth Annual SIGCPR Conference. New York, New York: Association for Computing Machinery, 1971.

Cita MLA (9a ed.)

Willoughby, Theodore C. Proceedings of the Ninth Annual SIGCPR Conference. Association for Computing Machinery, 1971.