source: This questionnaire must be completed by a vendor  furnishing copyrightable material, such as software, audio/visual works, written materials, etc.  to IBM.
target: This questionnaire must be completed by a vendor. The vendor must be furnishing copyrightable material to IBM. The material includes software, audio/visual works, written materials, etc.
references: This questionnaire must be completed by a vendor. The vendor must be furnishing copyrightable material to IBM. The material includes software, audio/visual works, written materials, etc.