Cita APA (7a ed.)

MacCracken, D. L. (1981). A production system version of the Hearsay-II speech understanding system. UMI Research Press.

Cita Chicago Style (17a ed.)

MacCracken, Donald L. A Production System Version of the Hearsay-II Speech Understanding System. Ann Arbor: UMI Research Press, 1981.

Cita MLA (9a ed.)

MacCracken, Donald L. A Production System Version of the Hearsay-II Speech Understanding System. UMI Research Press, 1981.