APA استشهاد

Wearing, S. (2009). Ecotourism: Impacts potentials and possibilities (2nd ed.). Elsevier.

استشهاد بنمط شيكاغو

Wearing, Stephen. Ecotourism: Impacts Potentials and Possibilities. 2nd ed. Amsterdam: Elsevier, 2009.

MLA استشهاد

Wearing, Stephen. Ecotourism: Impacts Potentials and Possibilities. 2nd ed. Elsevier, 2009.