References the don't collapse

PollitBouckaert.rdf

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                    <vcard:Address>
                       <vcard:locality>London</vcard:locality>
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                <foaf:name>Sage</foaf:name>
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                    <foaf:Person>
                        <foaf:surname>Pollitt</foaf:surname>
                        <foaf:givenname>Christopher</foaf:givenname>
                    </foaf:Person>
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                    <foaf:Person>
                        <foaf:surname>Bouckaert</foaf:surname>
                        <foaf:givenname>Geert</foaf:givenname>
                    </foaf:Person>
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        <dc:title>Quality improvement in European public services: concepts, cases and commentary</dc:title>
        <dc:date>1995</dc:date>
    </bib:Book>
    <bib:Book rdf:about="#item_146">
        <z:itemType>book</z:itemType>
        <dc:publisher>
            <foaf:Organization>
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                       <vcard:locality>Oxford</vcard:locality>
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                <foaf:name>Oxford University Press</foaf:name>
            </foaf:Organization>
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                        <foaf:surname>Pollitt</foaf:surname>
                        <foaf:givenname>Christopher</foaf:givenname>
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                    <foaf:Person>
                        <foaf:surname>Bouckaert</foaf:surname>
                        <foaf:givenname>Geert</foaf:givenname>
                    </foaf:Person>
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        </bib:authors>
        <dc:title>Public management and reform: a comparative analysis</dc:title>
        <prism:edition>2</prism:edition>
        <dc:date>2004</dc:date>
    </bib:Book>
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