Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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