Ashlock, R. B. (1983). Guiding each child's learning of mathematics: A diagnostic approach to instruction. C.E. Merrill Pub. Co.
Chicago-referens (17:e uppl.)Ashlock, Robert B. Guiding Each Child's Learning of Mathematics: A Diagnostic Approach to Instruction. Columbus, Ohio: C.E. Merrill Pub. Co, 1983.
MLA-referens (9:e uppl.)Ashlock, Robert B. Guiding Each Child's Learning of Mathematics: A Diagnostic Approach to Instruction. C.E. Merrill Pub. Co, 1983.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.