APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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