Παραπομπή σε μορφή APA (7η εκδ.)

Eadington, W. R., & Smith, V. L. (1992). Tourism alternatives: Potentials and problems in the development of tourism. University of Pennsylvania Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Eadington, William R., και Valene L. Smith. Tourism Alternatives: Potentials and Problems in the Development of Tourism. Philadelphia, Penn: University of Pennsylvania Press, 1992.

Παραπομπή σε μορφή MLA (9th εκδ.)

Eadington, William R., και Valene L. Smith. Tourism Alternatives: Potentials and Problems in the Development of Tourism. University of Pennsylvania Press, 1992.