Pacific Asia Travel Association. Pacific Division & Bookmark Biosphere Trust. (1996). Tourism through conservation, the Bookmark way. Pacific Asia Travel Association, Pacific Division.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিPacific Asia Travel Association. Pacific Division এবং Bookmark Biosphere Trust. Tourism Through Conservation, the Bookmark Way. Kings Cross, NSW: Pacific Asia Travel Association, Pacific Division, 1996.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিPacific Asia Travel Association. Pacific Division এবং Bookmark Biosphere Trust. Tourism Through Conservation, the Bookmark Way. Pacific Asia Travel Association, Pacific Division, 1996.
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