A3.2. Related non-moving image works (Appendix A - Part II - A3. Usage of uniform titles)
If the uniform title of the work being cataloged has been used as a uniform title or subject added entry heading on the bibliographic record of a related non-moving image work, such as a published screenplay or movie sound track, the uniform title should be used as the main entry heading on the work being cataloged.
See also:
Appendix A: Part II. A3. Usage of uniform titles