The problem I have with the endnote built in to pages is that I cannot cut and paste citations into it
I read this on Page 56 of the Pages'09 User Guide, and tried it. I could paste into the endnote. What is it that you can't do?
Adding an Endnote at the End of a Document
In a word processing document, you can add special marks in a document that link to notes at the end of the document. These notes are called document endnotes.
To add a document endnote:
Click Inspector in the toolbar, click the Document button, and then click Document.
Choose Use Document Endnotes from the Footnotes & Endnotes pop-up menu.
Choose a numbering format from the Format pop-up menu.
Choose whether endnotes are continuous or restart on each page or section from the Numbering pop-up menu.
Place the insertion point in the main text flow (not in a text box, table, or other object) where you want the endnote mark to appear.
Choose Insert > Endnote.
An endnote mark appears, and the insertion point moves to the corresponding endnote field at the end of the document following a section break. If you don’t want the endnotes on a new page, delete the section break.
Type the endnote information.
I was able to type or paste the endnote information. Please reply and say what is not working for you.
You can download the User Guide from the Help Menu in Pages.