Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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