APA (7th ed.) Citation

Weber Systems Inc. (1985). XENIX user's handbook: A practical guide to implementing and using this multi-user operating system. Century Communications.

Chicago Style (17th ed.) Citation

Weber Systems Inc. XENIX User's Handbook: A Practical Guide to Implementing and Using This Multi-user Operating System. London: Century Communications, 1985.

MLA (9th ed.) Citation

Weber Systems Inc. XENIX User's Handbook: A Practical Guide to Implementing and Using This Multi-user Operating System. Century Communications, 1985.

Warning: These citations may not always be 100% accurate.