[Zope] Object as subobject

I am making a web with bibliographic catalogues. I have the person objects which is referred by the bibliographic objects in various places : author, editor, subject etc. I have made a zclass for person which simply have their name, title, birth, etc. I intent to place them all in a folder say : authors I wish to implement the bibliographic record as zclass, but I do not known how to let refer to the person object in this zclass. Rgs Kent Sin