Cullen, R., & Gray, A. (1995). A Method for Taking a Reliable Statistical Sample of Reference Enquiries in a New Zealand Public Library System.
Chicago-Zitierstil (17. Ausg.)Cullen, Rowena, und Alistair Gray. A Method for Taking a Reliable Statistical Sample of Reference Enquiries in a New Zealand Public Library System. 1995.
MLA-Zitierstil (9. Ausg.)Cullen, Rowena, und Alistair Gray. A Method for Taking a Reliable Statistical Sample of Reference Enquiries in a New Zealand Public Library System. 1995.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.