Cita APA (7a ed.)

Mill, R. C., & Morrison, A. M. (1992). The tourism system: An introductory text (2nd ed.). Prentice Hall.

Cita Chicago Style (17a ed.)

Mill, Robert Christie, e Alastair M. Morrison. The Tourism System: An Introductory Text. 2nd ed. New Jersey: Prentice Hall, 1992.

Cita MLA (8a ed.)

Mill, Robert Christie, e Alastair M. Morrison. The Tourism System: An Introductory Text. 2nd ed. Prentice Hall, 1992.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.