Trích dẫn APA

Earl, C. J. C. (1939). The Relative Functions of the Occupation Centre and the Mental Deficiency Colony in the Training of Defectives. Ment Welf.

Trích dẫn kiểu Chicago

Earl, C. J. C. "The Relative Functions of the Occupation Centre and the Mental Deficiency Colony in the Training of Defectives." Ment Welf 1939.

Trích dẫn MLA

Earl, C. J. C. "The Relative Functions of the Occupation Centre and the Mental Deficiency Colony in the Training of Defectives." Ment Welf 1939.

Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.