APA-referens (7:e uppl.)
Checkley, K. (2006). The essentials of mathematics K-6: Effective curriculum, instruction, and assessment. Association for Supervision and Curriculum Development.
Chicago-referens (17:e uppl.)
Checkley, Kathy. The Essentials of Mathematics K-6: Effective Curriculum, Instruction, and Assessment. Alexandria, Va.: Association for Supervision and Curriculum Development, 2006.
MLA-referens (9:e uppl.)
Checkley, Kathy. The Essentials of Mathematics K-6: Effective Curriculum, Instruction, and Assessment. Association for Supervision and Curriculum Development, 2006.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.