Edwards, S. N. a., McLaughlin, W. J., & Ham, S. H. (1999). Comparative study of ecotourism policy in the americas: USA and Canada (Primera edición.). OEA, University of Idaho.
Citazione stile Chigago Style (17a edizione)Edwards, Stephen N. autor, William J. McLaughlin, e Sam H. Ham. Comparative Study of Ecotourism Policy in the Americas: USA and Canada. Primera edición. Washington: OEA, University of Idaho, 1999.
Citatione MLA (8a ed.)Edwards, Stephen N. autor, et al. Comparative Study of Ecotourism Policy in the Americas: USA and Canada. Primera edición. OEA, University of Idaho, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.