Gaya APA

Boo, E. (1990). Ecotourism: The Potential And Pitfalls Vol. 1 (Vol. 1). Washington DC: World Wildlife Fund.

Gaya MLA

Boo, Elizabeth. "Ecotourism: The Potential And Pitfalls Vol. 1". Vol. 1 Washington DC: World Wildlife Fund, 1990. Text.