Eng, H. (1999). The psychology of children's drawings: From the first stroke to the coloured drawing (Repr.). Routledge.
Chicago-Zitierstil (17. Ausg.)Eng, Helga. The Psychology of Children's Drawings: From the First Stroke to the Coloured Drawing. Repr. London: Routledge, 1999.
MLA-Zitierstil (9. Ausg.)Eng, Helga. The Psychology of Children's Drawings: From the First Stroke to the Coloured Drawing. Repr. Routledge, 1999.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.