IBM. (1983). Information/System: Version 2 (1a. ed.). New York: IBM.
Chicago Style CitationIBM. Information/System: Version 2. 1a. ed. New York: IBM, 1983.
MLA CitationIBM. Information/System: Version 2. 1a. ed. New York: IBM, 1983.
Warning: These citations may not always be 100% accurate.