Walford, A. J. Guide to Reference Material (3rd ed.). The Library Association.
Chicago ZitierstilWalford, A J. Guide to Reference Material. 3rd ed. London: The Library Association.
MLA ZitierstilWalford, A J. Guide to Reference Material. 3rd ed. The Library Association.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.