Cita APA (7a ed.)

Ashdown, R., Carpenter, B., & Bovair, K. (1991). The Curriculum challenge: Access to the national curriculum for pupils with learning difficulties. Falmer.

Cita Chicago Style (17a ed.)

Ashdown, Rob, Barry Carpenter, y Keith Bovair. The Curriculum Challenge: Access to the National Curriculum for Pupils with Learning Difficulties. London [etc.]: Falmer, 1991.

Cita MLA (9a ed.)

Ashdown, Rob, et al. The Curriculum Challenge: Access to the National Curriculum for Pupils with Learning Difficulties. Falmer, 1991.