I am having trouble getting the citation format right when an author has a suffix in his/her name (e.g., "Jr."). According to the APA format, this is how I'm supposed to cite this author in the reference list:

Smith, A. B., Jr. (2008). Article title. Etc...

The problem is, if I list the last name as "Smith" and first name as "A. B., Jr." in Zotero, Zotero doesn't recognize the "Jr." part as an author suffix, so it cites the person as "Smith, A. B. J." Listing the author's last name as "Smith, Jr." will cause Zotero to cite it as "Smith, Jr., A. B." Making it a single field author entry (as "A. B. Smith, Jr.") doesn't yield the proper citation either.

Any advice as to what I should do to get it right? Thanks very much!!

It is not ideal, but you can always use the full name box instead of the First and Last name boxes. You can toggle back and forth between the two by clicking on the white box to the right of an author's name.