There are several ways to insert multiple references in one in-text citation. When formatted, they appear as one multiple citation, sorted as your bibliographic style requires:
Unformatted: {Hall, 1988 #77; Baker, 1988 #16}
Formatted: (Baker, 1988; Hall, 1988)
You can insert any number of consecutive in-text citations; however, attempting to insert hundreds of EndNote references at one time may cause a system slowdown or freezing.
Note: If one of the citations in a multiple citation is not matched during formatting, the entire citation remains unformatted.
To insert multiple citations from within OpenOffice.org Writer:
From the EndNote menu, select Find Citation(s).
Enter a generic search term that will find the references you want, and click Search.
Hold down the Ctrl key while clicking on the desired references in the list (or hold down the Shift key to select a continuous range of references) in order to highlight the references.
Click Insert.
To insert multiple selected citations from EndNote:
In EndNote, hold down the Ctrl key while clicking on the desired references in your library (or hold down the Shift key to select a continuous range of references).
Switch back to the OpenOffice.org Writer document.
From the EndNote menu, select Insert Selected Citation(s).
To insert multiple citations individually:
Another option is to insert citations individually, but immediately next to each other. Cite While You Write merges adjacent citations during formatting. Citations do not merge if any character separates them–including a space or punctuation mark.
Unformatted: {Hall,1988 #77}{Baker, 1988 #16}
Merged when Formatted: (Baker, 1988; Hall, 1988)
Note: You can add citations to an existing in-text citation, or change the order of citations within the delimiters with the Edit Citations dialog.
To insert, remove, or edit citations within an existing in-text citation:
Click on the formatted citation.
In OpenOffice.org Writer, go to the EndNote menu and then Edit Citation(s) to display the EndNote Edit Citation dialog.
All of the cited references in the document are listed in the left column of the dialog. An ellipses shows where a citation appears within text. The line below shows the cited reference(s)
Highlight a citation, and then:
Click Remove to delete it.
Click Insert to insert another citation within the same set of delimiters.
Use the arrow buttons to change the order of the citation in a multiple citation. (If a Citation Sort Order is applied by the current output style, changing the order of citations in a multiple citation has no effect.)
You can use the other features on this dialog as described in Customizing Individual Citations.