Cita APA (7a ed.)

Gardiner, T. (2016). Teaching mathematics at secondary level. Open Book Publishers.

Cita Chicago Style (17a ed.)

Gardiner, Tony. Teaching Mathematics at Secondary Level. Cambridge, UK: Open Book Publishers, 2016.

Cita MLA (9a ed.)

Gardiner, Tony. Teaching Mathematics at Secondary Level. Open Book Publishers, 2016.