APA (7th ed.) Citation

Henry, G. M. (1971). A guide to the birds of Ceylon (2nd ed.). K. V. G. De Silva and Sons.

Chicago Style (17th ed.) Citation

Henry, G. M. A Guide to the Birds of Ceylon. 2nd ed. Kandy: K. V. G. De Silva and Sons, 1971.

MLA (9th ed.) Citation

Henry, G. M. A Guide to the Birds of Ceylon. 2nd ed. K. V. G. De Silva and Sons, 1971.