Ring Theory Conference University of Oklahoma, McDonald, B. R., & Morris, R. A. (1977). Ring theory II: Proceedings of the second Oklahoma conference. M. Dekker.

Ring Theory Conference University of Oklahoma, Bernard R. McDonald, and Robert A. Morris. Ring Theory II: Proceedings of the Second Oklahoma Conference. New York: M. Dekker, 1977.

Ring Theory Conference University of Oklahoma, et al. Ring Theory II: Proceedings of the Second Oklahoma Conference. M. Dekker, 1977.