{{cite web | url=http://www.europeana.eu/resolve/record/09404/450715ECF7ECB83113D29CCFCAD530D52C23C454|title=Philosohphiae [!] naturalis principia mathematica, auctore Isaaco Newtono. T. 3 continuatio, Lunae theoriam Newtonianam|author=Newton, Isaac (1642-1727)|accessdate=2013-05-19 |publisher=Europeana}}

<ref>{{cite web | url=http://www.europeana.eu/resolve/record/09404/450715ECF7ECB83113D29CCFCAD530D52C23C454|title=Philosohphiae [!] naturalis principia mathematica, auctore Isaaco Newtono. T. 3 continuatio, Lunae theoriam Newtonianam|author=Newton, Isaac (1642-1727)|accessdate=2013-05-19 |publisher=Europeana}}</ref>