According to the newly upgraded PyMOL website, the correct method for citing PyMOL is:
The PyMOL Molecular Graphics System, Version 1.3, Schrödinger, LLC.
However, I'm finding it difficult to choose a category in Endnote so that the format comes out as shown above. I know that this isn't a direct PyMOL usage question but I think citing PyMOL properly is important since there are many people who have put a lot of time and effort into making it what it is today.
Any suggestions would be greatly appreciated (or it might be nice to have a way to "download" and import the citation from the PyMOL website directly into Endnote). Thanks.