Citazione Stile APA (7a Edizione)

Koll, H., & Mills, S. (2008). Understanding shapes and measures. Ages 4-5. A & C Black.

Citazione stile Chigago Style (17a edizione)

Koll, Hilary, e Steve Mills. Understanding Shapes and Measures. Ages 4-5. London: A & C Black, 2008.

Citatione MLA (9a ed.)

Koll, Hilary, e Steve Mills. Understanding Shapes and Measures. Ages 4-5. A & C Black, 2008.