The two main professional organizations in computer science are the IEEE Computer Society and the ACM (Association for Computing Machinery). Each organization publishes general and specialized computing journals. Each of the professional organizations, the ACM and IEEE, maintains a comprehensive digital library of their journals and conference proceedings, IEEE Xplore, and the ACM Digital Library. Proceedings of scholarly conferences in computer science count as peer-reviewed publications. But your best bet may be to go directly to the journals that cover the ethics of computing and browse through them.
For a wide variety of references, use the Academic OneFile database from the library. Search for your topic, selecting the "Full Text" and "Peer-reviewed" options in the filters of the database.