APA (7th ed.) Citation

Fisher, J. (1946). Watching birds (Revised edition.). Penguin Books.

Chicago Style (17th ed.) Citation

Fisher, James. Watching Birds. Revised edition. Harmondsworth, New York: Penguin Books, 1946.

MLA (9th ed.) Citation

Fisher, James. Watching Birds. Revised edition. Penguin Books, 1946.

Warning: These citations may not always be 100% accurate.