Walford, A. J. (1970). Guide to reference material (2nd ed.). The Library Association.
Chicago Edition CitationWalford, A J. Guide to Reference Material. 2nd ed. London: The Library Association, 1970.
Cita MLAWalford, A J. Guide to Reference Material. 2nd ed. The Library Association, 1970.
Atenció: Aquestes cites poden no estar 100% correctes.