APA (7th ed.) Citation

Hong, L. T. (2005). Van Hiele levels and achievement in writing geometry proofs among form six students.

Chicago Style (17th ed.) Citation

Hong, Lay Tin. Van Hiele Levels and Achievement in Writing Geometry Proofs Among Form Six Students. 2005.

MLA (8th ed.) Citation

Hong, Lay Tin. Van Hiele Levels and Achievement in Writing Geometry Proofs Among Form Six Students. 2005.

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