APA

Janulis K., Dilley J., . (2017). Stone age. London: dorling kindersley.

Chicago

Janulis Klint, Dilley James, . 2017. Stone age. London: dorling kindersley.

Harvard

Janulis K., Dilley J., . (2017). Stone age. London: dorling kindersley.

MLA

Janulis Klint, Dilley James, . Stone age. London: dorling kindersley. 2017.