UptoDate recommends that you cite the UpToDate topic as a chapter in a book titled UpToDate. There are no page numbers to cite, and the publication year for any topic should be the current year.
The example below is provided by UpToDate:
Marion, DW. Diaphragmatic pacing. In: UpToDate, Post TW (Ed), UpToDate, Waltham, MA. (Accessed on November 25, 2013.)
Of course, this citation is just an example and may not be exactly what you need to cite given the style chosen by your instructor. Please visit our Citation Styles Research Guide for more information.
RefWorks is partially compatible with UpToDate. You will have to manually enter in citation data (see image below).
