APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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