APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.