APA (7th ed.) Citation

Sienna Mercer. (2012). My Sister The Vampire. Egmont UK Limited.

Chicago Style (17th ed.) Citation

Sienna Mercer. My Sister The Vampire. London: Egmont UK Limited, 2012.

MLA (9th ed.) Citation

Sienna Mercer. My Sister The Vampire. Egmont UK Limited, 2012.

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