APA Style
Nicholls, Judith. (2013).
Knock! Knock! .
London:
Ladybird Books Ltd.
Chicago Style
Nicholls, Judith.
Knock! Knock!.
London:
Ladybird Books Ltd,
2013.
Text.
MLA Style
Nicholls, Judith.
Knock! Knock!.
London:
Ladybird Books Ltd,
2013.
Text.
Turabian Style
Nicholls, Judith.
Knock! Knock!.
London:
Ladybird Books Ltd,
2013.
Print.