Cita APA (7a ed.)

Campbell, L. M. (1999). Ecotourism in rural developing communities. [s.n.].

Cita Chicago Style (17a ed.)

Campbell, Lisa M. Ecotourism in Rural Developing Communities. [S.l.]: [s.n.], 1999.

Cita MLA (9a ed.)

Campbell, Lisa M. Ecotourism in Rural Developing Communities. [s.n.], 1999.