Cita APA (7a ed.)

Butterworth, N. (1997). The Owl's Lesson (First published.). Collins.

Cita Chicago Style (17a ed.)

Butterworth, Nick. The Owl's Lesson. First published. London: Collins, 1997.

Cita MLA (9a ed.)

Butterworth, Nick. The Owl's Lesson. First published. Collins, 1997.