APA (7e ed.) Bronvermelding

Levinson, A. (1955). The mentally retarded child: A guide for parents; prepared under auspices of the Dr. Julian D. Levinson Research Foundation. George Allen & Unwin.

Chicago (17e ed.) Bronvermelding

Levinson, Abraham. The Mentally Retarded Child: A Guide for Parents; Prepared Under Auspices of the Dr. Julian D. Levinson Research Foundation. London: George Allen & Unwin, 1955.

MLA (8e ed.) Bronvermelding

Levinson, Abraham. The Mentally Retarded Child: A Guide for Parents; Prepared Under Auspices of the Dr. Julian D. Levinson Research Foundation. George Allen & Unwin, 1955.