APA (7th ed.) Citation

Cooke, D., Cooke, F., & Laubscher, C. (1987). Popular parrakeets: Australasian and Asian species in aviculture. Cassell.

Chicago Style (17th ed.) Citation

Cooke, Dulcie, Freddie Cooke, and Cyril Laubscher. Popular Parrakeets: Australasian and Asian Species in Aviculture. London: Cassell, 1987.

MLA (9th ed.) Citation

Cooke, Dulcie, et al. Popular Parrakeets: Australasian and Asian Species in Aviculture. Cassell, 1987.