Ballin, T. B. (2009). Archaeological pitchstone in northern Britain: Characterization and interpretation of an important prehistoric source. Archaeopress.
Chicago-Zitierstil (17. Ausg.)Ballin, Torben Bjarke. Archaeological Pitchstone in Northern Britain: Characterization and Interpretation of an Important Prehistoric Source. Oxford: Archaeopress, 2009.
MLA-Zitierstil (9. Ausg.)Ballin, Torben Bjarke. Archaeological Pitchstone in Northern Britain: Characterization and Interpretation of an Important Prehistoric Source. Archaeopress, 2009.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.