APA

Helbrough E., Parker L. & Silver M. (2006). How Flowers Grow. London: Usborne Publishing.

Chicago

Helbrough Emma, Parker Laura and Silver Maggic. 2006. How Flowers Grow. London: Usborne Publishing.

Harvard

Helbrough E., Parker L. and Silver M. (2006). How Flowers Grow. London: Usborne Publishing.

MLA

Helbrough Emma, Parker Laura and Silver Maggic. How Flowers Grow. London: Usborne Publishing. 2006.