APA (7th ed.) Citation

Leyden, P. (2011). The butterfly heart (First published.). Walker Books.

Chicago Style (17th ed.) Citation

Leyden, Paula. The Butterfly Heart. First published. London: Walker Books, 2011.

MLA (9th ed.) Citation

Leyden, Paula. The Butterfly Heart. First published. Walker Books, 2011.

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