Wearing, S. (2009). Ecotourism: Impacts potentials and possibilities (2nd ed.). Elsevier.
Chicago Style aipamenaWearing, Stephen. Ecotourism: Impacts Potentials and Possibilities. 2nd ed. Amsterdam: Elsevier, 2009.
MLA aipamenaWearing, Stephen. Ecotourism: Impacts Potentials and Possibilities. 2nd ed. Elsevier, 2009.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.