APA aipamena

Weaver, D. B. (1998). Ecotourism in the less developed world David B. Weaver. CAB International.

Chicago Style aipamena

Weaver, David B. Ecotourism in the Less Developed World David B. Weaver. CAB International, 1998.

MLA aipamena

Weaver, David B. Ecotourism in the Less Developed World David B. Weaver. CAB International, 1998.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.