Dyfyniad APA

Neisworth, J. T., & Smith, R. 1. (1978). Retardation: Issues, assessment, and intervention. McGraw-Hill.

Dyfyniad Arddull Chicago

Neisworth, John T., and Robert 1932 Smith. Retardation: Issues, Assessment, and Intervention. New York: McGraw-Hill, 1978.

Dyfyniad MLA

Neisworth, John T., and Robert 1932 Smith. Retardation: Issues, Assessment, and Intervention. McGraw-Hill, 1978.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.