You can attach a PDF (or other file) to a reference in EndNote Basic.
In the My References Tab, click the paper clip icon at the bottom of the reference to which you would like to attach a file.
This is the most labor-intensive way to enter references into EndNote Basic, and it is the most prone to errors.
Authors must be entered one per line, so press Enter after each author’s name
Einstein, Howard G.
de Gaulle, Charles
Einstein, H G or Einstein, H.G. (not Einstein, HG)
Einstein, Albert, Jr.
American College of Physicians, (notice the comma at the end)
Page numbers can be entered in any of the following forms, with commas between non-consecutive ranges.
1492-1497
1492-7
124-127, 130, 191-194