APA

Eng H. K., . (1954). The psychology of children's drawings from the first stroke to the coloured drawing. London: Routledge & Kegan.

Chicago

Eng Helga Kristine, . 1954. The psychology of children's drawings from the first stroke to the coloured drawing. London: Routledge & Kegan.

Harvard

Eng H. K., . (1954). The psychology of children's drawings from the first stroke to the coloured drawing. London: Routledge & Kegan.

MLA

Eng Helga Kristine, . The psychology of children's drawings from the first stroke to the coloured drawing. London: Routledge & Kegan. 1954.