APA

Clark G., Hopkins A. & Potter J. (2008). Leonardo da Vinci. England, UK: Penguin readers Plc.

Chicago

Clark Georgia, Hopkins Andy and Potter Jocelyn. 2008. Leonardo da Vinci. England, UK: Penguin readers Plc.

Harvard

Clark G., Hopkins A. and Potter J. (2008). Leonardo da Vinci. England, UK: Penguin readers Plc.

MLA

Clark Georgia, Hopkins Andy and Potter Jocelyn. Leonardo da Vinci. England, UK: Penguin readers Plc. 2008.