Rosskopf, M. F., & Taback, S. (1971). Piagetian cognitve development research and mathematical education. National Council of Teachers of Mathematics.
Lua i Stíl Chicago (17ú heag.)Rosskopf, Myron F., agus Stanley Taback. Piagetian Cognitve Development Research and Mathematical Education. Washington: National Council of Teachers of Mathematics, 1971.
Lua MLA (9ú heag.)Rosskopf, Myron F., agus Stanley Taback. Piagetian Cognitve Development Research and Mathematical Education. National Council of Teachers of Mathematics, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.