Yabao, S., Feleo, A., & Sheniak, D. (2005). Cagraray: A Bicol island-world. Cagraray Environmental Protection and Development Foundation.
Chicago-viite (17. p.)Yabao, Sonny, Anita Feleo, ja David Sheniak. Cagraray: A Bicol Island-world. Legazpi City: Cagraray Environmental Protection and Development Foundation, 2005.
MLA-viite (9. p.)Yabao, Sonny, et al. Cagraray: A Bicol Island-world. Cagraray Environmental Protection and Development Foundation, 2005.
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