Conference on Software Maintenance Sorrento, Italy, IEEE Computer Society. Software Engineering Technical Committee, Institute of Electrical and Electronics Engineers, & Software Maintenance Association. (1991). Conference on Software Maintenance 1991, October 15-17, 1991 - Sorrento, Italy: Proceedings. IEEE Computer Society Press.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Conference on Software Maintenance Sorrento, Italy, IEEE Computer Society. Software Engineering Technical Committee, Institute of Electrical and Electronics Engineers, và Software Maintenance Association. Conference on Software Maintenance 1991, October 15-17, 1991 - Sorrento, Italy: Proceedings. Los Alamitos, Calif.: IEEE Computer Society Press, 1991.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Conference on Software Maintenance Sorrento, Italy, et al. Conference on Software Maintenance 1991, October 15-17, 1991 - Sorrento, Italy: Proceedings. IEEE Computer Society Press, 1991.