Q. When citing a monograph from the Review of Natural Products, do I cite them or Facts and Comparisons?
This certainly is a complicated example! The closest citation format would be to treat the monograph as part of a book on the Internet, which is discussed in Chapter 22, section B in Citing Medicine. You can more or less follow the sample citation there, with some slight modification.
Instead of authors, you can use the editors for Review of Natural Products. The publisher is actually Wolters Kluwer Health, Inc. (Facts & Comparisons is one of their brands). The place of publication is St. Louis, MO. Following the date of publication you list the name of the monograph. This is where, in the example, Citing Medicine lists a figure called "Ribosome assembly". After the name of the monograph, give in brackets the update date for that particular monograph along with the date you are citing this content. You then have an estimation of the length of the monograph in screens (i.e. computer screens), followed by the URL for the monograph as you accessed it in Facts & Comparisons.
If you have any further questions, feel free to reply back or visit us in the library. Good luck.