APA

Conference on Software for Critical Systems, Association for Computing Machinery, . (1991). Proceedings of the ACM SIGSOFT '91 Conference on Software for Critical Systems. New York, NY: ACM Press.

Chicago

Conference on Software for Critical Systems, Association for Computing Machinery, . 1991. Proceedings of the ACM SIGSOFT '91 Conference on Software for Critical Systems. New York, NY: ACM Press.

Harvard

Conference on Software for Critical Systems, Association for Computing Machinery, . (1991). Proceedings of the ACM SIGSOFT '91 Conference on Software for Critical Systems. New York, NY: ACM Press.

MLA

Conference on Software for Critical Systems, Association for Computing Machinery, . Proceedings of the ACM SIGSOFT '91 Conference on Software for Critical Systems. New York, NY: ACM Press. 1991.