Cita APA (7a ed.)

Hughes, M. (1995). Children and number: Difficulties in learning mathematics. Blackwell.

Cita Chicago Style (17a ed.)

Hughes, Martin. Children and Number: Difficulties in Learning Mathematics. Oxford [etc.]: Blackwell, 1995.

Cita MLA (9a ed.)

Hughes, Martin. Children and Number: Difficulties in Learning Mathematics. Blackwell, 1995.