APA (7th ed.) Citation

Christine Butterworth & Donna Bailey. (1990). Owls. Heinemann educational books ltd.

Chicago Style (17th ed.) Citation

Christine Butterworth and Donna Bailey. Owls. Hong kong: Heinemann educational books ltd, 1990.

MLA (9th ed.) Citation

Christine Butterworth and Donna Bailey. Owls. Heinemann educational books ltd, 1990.

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