Krueger, I. (2007). An emerald of glass: The emerald of Charlemagne at Mittelzell, Reichenau. Facts and artefacts.
Citación estilo ChicagoKrueger, Ingeborg. "An Emerald of Glass: The Emerald of Charlemagne At Mittelzell, Reichenau." Facts and Artefacts 2007.
Cita MLAKrueger, Ingeborg. "An Emerald of Glass: The Emerald of Charlemagne At Mittelzell, Reichenau." Facts and Artefacts 2007.
Warning: These citations may not always be 100% accurate.