APA (7th ed.) Citation

He, Q., & Brna, P. (2005). The development of a fraction testing and tutoring system.

Chicago Style (17th ed.) Citation

He, Qingping, and Paul Brna. The Development of a Fraction Testing and Tutoring System. 2005.

MLA (9th ed.) Citation

He, Qingping, and Paul Brna. The Development of a Fraction Testing and Tutoring System. 2005.

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