APA (7th ed.) Citation

Lambert, M., & Pearson, A. (1992). Birds by colour: The simplest identification guide. Blandford.

Chicago Style (17th ed.) Citation

Lambert, Mike, and Alan Pearson. Birds by Colour: The Simplest Identification Guide. London: Blandford, 1992.

MLA (9th ed.) Citation

Lambert, Mike, and Alan Pearson. Birds by Colour: The Simplest Identification Guide. Blandford, 1992.