APA

Ellis N. R., . (1963). Handbook of mental deficiency: psychological theory and research. New York: McGraw-Hill.

Chicago

Ellis Norman R, . 1963. Handbook of mental deficiency: psychological theory and research. New York: McGraw-Hill.

Harvard

Ellis N. R., . (1963). Handbook of mental deficiency: psychological theory and research. New York: McGraw-Hill.

MLA

Ellis Norman R, . Handbook of mental deficiency: psychological theory and research. New York: McGraw-Hill. 1963.