Wolfgang, C. H., & Wolfgang, M. E. (1999). School for young children: Developmentally appropriate practices (2nd ed.). Boston: Allyn and Bacon.
Dyfyniad Arddull ChicagoWolfgang, Charles H., và Mary E. Wolfgang. School for Young Children: Developmentally Appropriate Practices. 2nd ed. Boston: Allyn and Bacon, 1999.
Dyfyniad MLAWolfgang, Charles H., và Mary E. Wolfgang. School for Young Children: Developmentally Appropriate Practices. 2nd ed. Boston: Allyn and Bacon, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.