Cathcart, W. G. (2000). Learning mathematics in elementary and middle schools. Merrill.
Dyfyniad Arddull ChicagoCathcart, W. George. Learning Mathematics in Elementary and Middle Schools. Upper Saddle River, N.J: Merrill, 2000.
Dyfyniad MLACathcart, W. George. Learning Mathematics in Elementary and Middle Schools. Merrill, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.