Citazione Stile APA (7a Edizione)

Middleton, V. T. C., & Hawkins, R. (1998). Sustainable tourism: A marketing perspective. Butterworth-Heinemann.

Citazione stile Chigago Style (17a edizione)

Middleton, Victor T. C., e Rebecca Hawkins. Sustainable Tourism: A Marketing Perspective. Oxford, Woburn, MA: Butterworth-Heinemann, 1998.

Citatione MLA (9a ed.)

Middleton, Victor T. C., e Rebecca Hawkins. Sustainable Tourism: A Marketing Perspective. Butterworth-Heinemann, 1998.