Cita APA (7a ed.)

National Conference on Artificial Intelligence & American Association for Artificial Intelligence. (1991). Proceedings Ninth National Conference on Artificial Intelligence: AAAI 91. AAAI [etc.].

Cita Chicago Style (17a ed.)

National Conference on Artificial Intelligence y American Association for Artificial Intelligence. Proceedings Ninth National Conference on Artificial Intelligence: AAAI 91. Menlo Park, California [etc.]: AAAI [etc.], 1991.

Cita MLA (9a ed.)

National Conference on Artificial Intelligence y American Association for Artificial Intelligence. Proceedings Ninth National Conference on Artificial Intelligence: AAAI 91. AAAI [etc.], 1991.