APA

Jeffers O., . (2014). Up and down. London: HarperCollins Children's Books.

Chicago

Jeffers Oliver, . 2014. Up and down. London: HarperCollins Children's Books.

Harvard

Jeffers O., . (2014). Up and down. London: HarperCollins Children's Books.

MLA

Jeffers Oliver, . Up and down. London: HarperCollins Children's Books. 2014.