APA

Hogan M., . (2015). My frist numbers. London: ladybird.

Chicago

Hogan Martina, . 2015. My frist numbers. London: ladybird.

Harvard

Hogan M., . (2015). My frist numbers. London: ladybird.

MLA

Hogan Martina, . My frist numbers. London: ladybird. 2015.