Catron, C. E., & Allen, J. (1993). Early childhood curriculum. Merrill.
Dyfyniad Arddull ChicagoCatron, Carol Elaine, and Jan Allen. Early Childhood Curriculum. New York: Merrill, 1993.
Dyfyniad MLACatron, Carol Elaine, and Jan Allen. Early Childhood Curriculum. Merrill, 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.