Cita APA (7a ed.)
ebrary, Inc, Black, R., & Crabtree, A. (2007). Quality assurance and certification in ecotourism. CABI Pub..
Cita Chicago Style (17a ed.)
ebrary, Inc, Rosemary Black, y Alice Crabtree. Quality Assurance and Certification in Ecotourism. Cambridge, MA ; Wallingford: CABI Pub., 2007.
Cita MLA (9a ed.)
ebrary, Inc, et al. Quality Assurance and Certification in Ecotourism. CABI Pub., 2007.
Precaución: Estas citas no son 100% exactas.