APA (7th ed.) Citation

British Ornithologists' Union. (1915). A list of British birds (2d and rev. ed.). British ornithologists' union.

Chicago Style (17th ed.) Citation

British Ornithologists' Union. A List of British Birds. 2d and rev. ed. London: British ornithologists' union, 1915.

MLA (9th ed.) Citation

British Ornithologists' Union. A List of British Birds. 2d and rev. ed. British ornithologists' union, 1915.