APA

British Ornithologists Union, Campbell B. & Lack E. (1985). A dictionary of birds. Great Britain: The British Ornitologists Union.

Chicago

British Ornithologists Union, Campbell Bruce and Lack Elizabeth. 1985. A dictionary of birds. Great Britain: The British Ornitologists Union.

Harvard

British Ornithologists Union, Campbell B. and Lack E. (1985). A dictionary of birds. Great Britain: The British Ornitologists Union.

MLA

British Ornithologists Union, Campbell Bruce and Lack Elizabeth. A dictionary of birds. Great Britain: The British Ornitologists Union. 1985.