(1987). Walford's guide to reference material (4th ed.). Library Association.
Chicagoスタイル(17版)引用形式Walford's Guide to Reference Material. 4th ed. London: Library Association, 1987.
MLA(9版)引用形式Walford's Guide to Reference Material. 4th ed. Library Association, 1987.
警告: この引用は必ずしも正確ではありません.