If for some reason you are unable to export a reference from a database, or you do not have access to electronic records, it is possible to add references to EndNote manually.
You can create a new reference either by pressing CTRL + N, selecting New Reference from the menu bar, or using the menu to select Reference -> New Reference.
A new window opens with all blank fields to be filled in. First of all, select the reference type from the dropdown menu.
Fill in as many of the fields as you can. For journal articles, it's necessary to include the following:
Author
Year
Title
Journal Title
Volume
Issue
Start page
When done, close the window (be sure to click the smaller X in the top right of the window, not EndNote itself!) Your changes will automatically save.