APA

Donaldson J., Scheffler A., . (2016). The Snail and the Whale. : .

Chicago

Donaldson Julia, Scheffler Axel, . 2016. The Snail and the Whale. : .

Harvard

Donaldson J., Scheffler A., . (2016). The Snail and the Whale. : .

MLA

Donaldson Julia, Scheffler Axel, . The Snail and the Whale. : . 2016.