Cita APA (7a ed.)

Open Book Publishers, publisher, provider, & Gardiner, A. 1. a. (2016). Teaching mathematics at secondary level. Open Book Publishers.

Cita Chicago Style (17a ed.)

Open Book Publishers, publisher, provider, y A. 1947- author Gardiner. Teaching Mathematics at Secondary Level. Cambridge, England: Open Book Publishers, 2016.

Cita MLA (9a ed.)

Open Book Publishers, publisher, provider, y A. 1947- author Gardiner. Teaching Mathematics at Secondary Level. Open Book Publishers, 2016.