Crabb, G. (1976). Copyright clearance: A practical guide. Council for Educational Technology for the United Kingdom.
Chicago-Zitierstil (17. Ausg.)Crabb, Geoffrey. Copyright Clearance: A Practical Guide. London: Council for Educational Technology for the United Kingdom, 1976.
MLA-Zitierstil (9. Ausg.)Crabb, Geoffrey. Copyright Clearance: A Practical Guide. Council for Educational Technology for the United Kingdom, 1976.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.