Sumner, J. R. (1972). Statistics for hotels and catering. Edward Arnold.
Chicagoスタイル(17版)引用形式Sumner, John R. Statistics for Hotels and Catering. [London]: Edward Arnold, 1972.
MLA(9版)引用形式Sumner, John R. Statistics for Hotels and Catering. Edward Arnold, 1972.
警告: この引用は必ずしも正確ではありません.