Cita APA

Bien, A. (1999). Errors and principles of action of ecotourism projects.

Chicago Style Citation

Bien, Amos. Errors and Principles of Action of Ecotourism Projects. 1999.

Cita MLA

Bien, Amos. Errors and Principles of Action of Ecotourism Projects. 1999.

Atenció: Aquestes cites poden no estar 100% correctes.