Coyne, G. V. (1983). Gregorian reform of the calendar: Proceedings of Vatican conference to commemorate its 400. anniversary, 1582 - 1982. Specola Vaticana.
Chicago-Zitierstil (17. Ausg.)Coyne, George V. Gregorian Reform of the Calendar: Proceedings of Vatican Conference to Commemorate Its 400. Anniversary, 1582 - 1982. Città del Vaticano: Specola Vaticana, 1983.
MLA-Zitierstil (9. Ausg.)Coyne, George V. Gregorian Reform of the Calendar: Proceedings of Vatican Conference to Commemorate Its 400. Anniversary, 1582 - 1982. Specola Vaticana, 1983.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.