APA citáció

Fritz-Stratmann Annemarie, Ricken Gabi, & Balzer Lars. (2012). A developmental model of arithmetic competencies in age 4-8.

Chicago Style (17th ed.) Citation

Fritz-Stratmann Annemarie, Ricken Gabi, and Balzer Lars. A Developmental Model of Arithmetic Competencies in Age 4-8. 2012.

MLA idézés

Fritz-Stratmann Annemarie, et al. A Developmental Model of Arithmetic Competencies in Age 4-8. 2012.