Libosada, C. M. (2008). Birdwatching in the Philippines. Department of Tourism ; Recreational Outdoor Exchange ; Wild Bird Club of the Philippines.
Chicago-referens (17:e uppl.)Libosada, Carlos M. Birdwatching in the Philippines. Manila: Department of Tourism ; Recreational Outdoor Exchange ; Wild Bird Club of the Philippines, 2008.
MLA-referens (9:e uppl.)Libosada, Carlos M. Birdwatching in the Philippines. Department of Tourism ; Recreational Outdoor Exchange ; Wild Bird Club of the Philippines, 2008.
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