Edgell, D. L., Allen, M. D., & Smith, G. (2008). Tourism Policy and Planning: Yesterday, Today and Tomorrow. Butterworth-Heinemann.
Citazione stile Chigago Style (17a edizione)Edgell, David L., Maria DelMastro Allen, e Ginger Smith. Tourism Policy and Planning: Yesterday, Today and Tomorrow. Oxford: Butterworth-Heinemann, 2008.
Citatione MLA (9a ed.)Edgell, David L., et al. Tourism Policy and Planning: Yesterday, Today and Tomorrow. Butterworth-Heinemann, 2008.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.