APA (7th ed.) Citation

Black, R., & Crabtree, A. (2007). Quality assurance and certification in ecotourism. CABI. https://doi.org/10.1079/9781845932374.0000

Chicago Style (17th ed.) Citation

Black, Rosemary, and Alice Crabtree. Quality Assurance and Certification in Ecotourism. Wallingford, Oxfordshire, UK: CABI, 2007. https://doi.org/10.1079/9781845932374.0000.

MLA (9th ed.) Citation

Black, Rosemary, and Alice Crabtree. Quality Assurance and Certification in Ecotourism. CABI, 2007. https://doi.org/10.1079/9781845932374.0000.