Wildlife Conservation Society of the Philippines, World Conservation Monitoring Centre, & Friends of the Zoos. (1997). Philippine red data book. Bookmark.
Citazione stile Chigago Style (17a edizione)Wildlife Conservation Society of the Philippines, World Conservation Monitoring Centre, e Friends of the Zoos. Philippine Red Data Book. Makati City, Philippines: Bookmark, 1997.
Citatione MLA (9a ed.)Wildlife Conservation Society of the Philippines, et al. Philippine Red Data Book. Bookmark, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.