Eng, H. (1957). The psychology of child and youth drawing: From the ninth to the twenty-fourth year. Routledge & Kegan Paul.
Chicago-Zitierstil (17. Ausg.)Eng, Helga. The Psychology of Child and Youth Drawing: From the Ninth to the Twenty-fourth Year. London: Routledge & Kegan Paul, 1957.
MLA-Zitierstil (9. Ausg.)Eng, Helga. The Psychology of Child and Youth Drawing: From the Ninth to the Twenty-fourth Year. Routledge & Kegan Paul, 1957.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.