| การอ้างอิง |
Acebes, J.M.V. and L.A.R. Lesaca, 2003 Research and conservation of humpback whales (Megaptera novaeangliae) and other cetacean species in the Babuyan Islands, Cagayan Province, northern Luzon, Philippines. pp, 34-42. In Van der Ploeg, J., Masipiquena, A. and Bernardo, E.C. (eds). The Sierra Madre Mountain Range: Global relevance, local realities, Papers presented at the 4th Regional Conference on Environment and Development. Cagayan Valley Program on Environment and Development, Golden Press, Tuguegarao City. |
