sixth ed; No. I did find a copy of the second edition on Scribd you can get a free trial and download it. Be sure to end your subscript afterwards if you don't want to take advantage of the library afterwards or you will get charged. If you Look through the OpenLibray.org the seventh edition is there for borrowing, but not downloading.

If you're looking for a book for a class i would recommend getting a 6th ed. since work problems seem to change edition to edition. If you're looking for a reference, not much of the math has changed in recent history and either of these would be fine as references.