Cita APA (7a ed.)

Howson, G. (1991). National curricula in mathematics. The Mathematical Association.

Cita Chicago Style (17a ed.)

Howson, Geoffrey. National Curricula in Mathematics. Gran Bretaña: The Mathematical Association, 1991.

Cita MLA (8a ed.)

Howson, Geoffrey. National Curricula in Mathematics. The Mathematical Association, 1991.