Heuvel-Panhuizen, M. v. d. (2001). Children learn mathematics: A learning-teaching trajectory with intermediate attainment targets for calculation with whole numbers in primary school. Freudenthal Institute, Utrecht University and National Institute for Curriculum Development (SLO).
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিHeuvel-Panhuizen, Marja van den. Children Learn Mathematics: A Learning-teaching Trajectory with Intermediate Attainment Targets for Calculation with Whole Numbers in Primary School. Netherlands: Freudenthal Institute, Utrecht University and National Institute for Curriculum Development (SLO), 2001.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিHeuvel-Panhuizen, Marja van den. Children Learn Mathematics: A Learning-teaching Trajectory with Intermediate Attainment Targets for Calculation with Whole Numbers in Primary School. Freudenthal Institute, Utrecht University and National Institute for Curriculum Development (SLO), 2001.