You can define relationships between citations from within the citation
Open one of the citations in the relationship.
Select either the Add related to or Add
related from related links.
Complete the form using the field from the table.
Table 1. Adding relationships between citations
||The content that is the object of the
||The Relationship Type.
||The content that is the subject of the
The display-only fields at the bottom will display the information from the
other Citation record.
The citation appears in the Related to or
Related from related list, as appropriate.