APA (7th ed.) Citation

Warakagoda, D., Wijeyeratne, G. D. S., & Zylva, T. D. (2000). A photographic guide to birds of Sri Lanka. New Holland Publishers.

Chicago Style (17th ed.) Citation

Warakagoda, Deepal, Gehan De Silva Wijeyeratne, and T.S.U. De Zylva. A Photographic Guide to Birds of Sri Lanka. London: New Holland Publishers, 2000.

MLA (9th ed.) Citation

Warakagoda, Deepal, et al. A Photographic Guide to Birds of Sri Lanka. New Holland Publishers, 2000.