APA aipamena

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.

Chicago Style aipamena

Edwards, Stephen N. autor, William J. McLaughlin, and Sam H. Ham. Comparative Study of Ecotourism Policy in the Americas: USA and Canada. Primera edición. Washington: OEA, University of Idaho, 1999.

MLA aipamena

Edwards, Stephen N. autor, et al. Comparative Study of Ecotourism Policy in the Americas: USA and Canada. Primera edición. OEA, University of Idaho, 1999.