Cita APA (7th ed.)

Cooper, C. P., & Shepherd, R. (1998). Tourism: Principles and practice (2nd ed.). Longman.

Cita Chicago (17th ed.)

Cooper, Christopher P., i Rebecca Shepherd. Tourism: Principles and Practice. 2nd ed. Harlow, Eng: Longman, 1998.

Cita MLA (9th ed.)

Cooper, Christopher P., i Rebecca Shepherd. Tourism: Principles and Practice. 2nd ed. Longman, 1998.