APA (7th ed.) Citation

Forshaw, J. M., & Cooper, W. T. (1989). Parrots of the world (3rd rev. ed.). Blandford.

Chicago Style (17th ed.) Citation

Forshaw, Joseph Michael, and William T. Cooper. Parrots of the World. 3rd rev. ed. London: Blandford, 1989.

MLA (9th ed.) Citation

Forshaw, Joseph Michael, and William T. Cooper. Parrots of the World. 3rd rev. ed. Blandford, 1989.