APA

Williams B., Goodyer C. & Hardcastle B. (2010). First world war. London: Ladybird books.

Chicago

Williams Brian, Goodyer Clive and Hardcastle Brian. 2010. First world war. London: Ladybird books.

Harvard

Williams B., Goodyer C. and Hardcastle B. (2010). First world war. London: Ladybird books.

MLA

Williams Brian, Goodyer Clive and Hardcastle Brian. First world war. London: Ladybird books. 2010.