APA (7th ed.) Citation

Collar, N. J., Mallari, N. A. D., Tabaranza, B. R., & Crosby, M. J. (1999). Threatened birds of the Philippines: The Haribon Foundation/BirdLife International Red data book. Bookmark.

Chicago Style (17th ed.) Citation

Collar, N. J., Neil Aldrin D. Mallari, Blas R. Tabaranza, and M. J. Crosby. Threatened Birds of the Philippines: The Haribon Foundation/BirdLife International Red Data Book. Makati City, Philippines: Bookmark, 1999.

MLA (9th ed.) Citation

Collar, N. J., et al. Threatened Birds of the Philippines: The Haribon Foundation/BirdLife International Red Data Book. Bookmark, 1999.