Dyfyniad APA

Matson, J. L., & Barrett, R. P. (1993). Psychopathology in the mentally retarded. Allyn and Bacon.

Dyfyniad Arddull Chicago

Matson, Johnny L., and Rowland P. Barrett. Psychopathology in the Mentally Retarded. Boston: Allyn and Bacon, 1993.

Dyfyniad MLA

Matson, Johnny L., and Rowland P. Barrett. Psychopathology in the Mentally Retarded. Allyn and Bacon, 1993.

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