To mannually add a reference to an EndNote Desktop library:
Step 1: Click on the References menu and select New Reference.
Step 2: Select the Reference Type. The entry fields will change for each type of source.
Step 3: For most reference types begin by entering the author(s). EndNote Desktop will suggest authors already in your EndNote library as you type. Authors not in your library will appear in red.
Tips for entering authors names:
Corporate or Institutional Names
Step 4: Press Tab to move to the next field.
Step 5: Attach PDFs or other file types to the reference by tabbing or scrolling to the File Attachments field and in the References menu choose File Attachments and Attach File and choose the appropriate file from your device.
Step 6: Add personal notes about the reference in the Research Notes field.
Step 7: When you're done entering the reference, choose Close Reference from the File menu and choose Yes when prompted to save your changes.