How do I add citation data to a feature in a DNA or protein sequence file?
Add Reference Information to the Sequence
First, add citation data to the sequence file via the Description Panel as described here: Add Reference Information to a Sequence File.
Edit a Feature to Add a Citation
In Map view, Sequence view, or Features view, double-click on the relevant feature to edit it.
In the "Edit Feature" window, set the qualifier type to "/citation". Use the menu to choose the citation you wish to associate with the feature.
If desired, add information about the "Relevant Pages" in the cited work.
In Features view, the new "/citation" qualifier will be listed. The citation will be displayed with its reference number. Click on a blue reference number hyperlink to open the referenced work in your default web browser.