Dyfyniad APA

(1963). Handbook of mental deficiency: Psychological theory and research. McGraw-Hill.

Dyfyniad Arddull Chicago

Handbook of Mental Deficiency: Psychological Theory and Research. New York: McGraw-Hill, 1963.

Dyfyniad MLA

Handbook of Mental Deficiency: Psychological Theory and Research. McGraw-Hill, 1963.

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