Παραπομπή σε μορφή APA (7η εκδ.)

Hallas, C. H. (1970). The care and training of the mentally subnormal (4th ed.). Williams and Wilkins.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hallas, Charles H. The Care and Training of the Mentally Subnormal. 4th ed. Baltimore: Williams and Wilkins, 1970.

Παραπομπή σε μορφή MLA (8th εκδ.)

Hallas, Charles H. The Care and Training of the Mentally Subnormal. 4th ed. Williams and Wilkins, 1970.