Dyfyniad APA

Sumner, J. R. (1972). Statistics for hotels and catering. Edward Arnold.

Dyfyniad Arddull Chicago

Sumner, John R. Statistics for Hotels and Catering. [London]: Edward Arnold, 1972.

Dyfyniad MLA

Sumner, John R. Statistics for Hotels and Catering. Edward Arnold, 1972.

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