Bardoody, A. J., & Dowker, A. The development of arithmetic concepts and skills: Constructing adaptive expertise.
Citazione stile Chigago Style (17a edizione)Bardoody, Arthur J., e Ann Dowker. The Development of Arithmetic Concepts and Skills: Constructing Adaptive Expertise.
Citatione MLA (8a ed.)Bardoody, Arthur J., e Ann Dowker. The Development of Arithmetic Concepts and Skills: Constructing Adaptive Expertise.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.