APA (7th ed.) Citation

Barclay-Smith, P., & Gould, J. (1941). British Birds .. Penguin.

Chicago Style (17th ed.) Citation

Barclay-Smith, Phyllis, and John Gould. British Birds .. London: Penguin, 1941.

MLA (9th ed.) Citation

Barclay-Smith, Phyllis, and John Gould. British Birds .. Penguin, 1941.

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