In the Navigation Pane, click Lexicon, and then click Lexicon Edit.
In the Entries pane, click the desired entry.
In the Entry pane, if you cannot see the desired Bibliography field, show hidden fields.
Do one or more of the following:
For bibliographical information at the entry level, click the Bibliography field that appears above the Sense label(s), and then type the information.
For bibliographical information at the sense or subsense level, click the Bibliography field that appears in the applicable sense or subsense, and then type the information.