How to enter both author and editor?

I’m sure there’s a simple answer, but I can’t find it.  Using any of the standard publication types that come with Endnote, how do I enter a book with both an author and an editor (put another way: Author, Title (edited by editor)…  Or do I need to create a custom publication type?  (Typically I’m using APA style, but it’s more the entry form I’m interested in.)  Thanks.

Correct, I’m not talking about a chapter.  The “book section” template does let me capture all the relevant information.  Here’s the actual cite I’m working with:

Fritz Goro, On the Nature of Things: The Scientific Photography of Fritz Goro, edited by Thomas J. Goreau, Peter Goreau and Stefan Goreau (New York: Aperture, 1993).  The body of the book are the photos by Goro, with introductory text by the Goreau brothers (Goro’s grandsons).

A similar issue might be reissued volumes by famous authors.  For example:

Mark Twain, The Adventures of Huckleberry Finn, edited by Guy Cardwell and with an introduction by John Seelye (New York: Penguin Books, 2003). 

But even my university library displays this as: Mark Twain, John Seelye, and Guy Cardwell, The Adventures of Huckleberry Finn (New York: Penguin Books, 2003). 

(This particular Twain case might not be the best example, since Seelye and Cardwell have different roles.  But let’s imagine they’re both just editors.)

Maybe I just need to create a new template for this kind of situation. 

Thanks for any suggestions.

Bruce