Hallas, C. H. (1970). The care and training of the mentally subnormal: With a foreword by Ronald C. MacGillivray (4.ed.). Williams & Wilkins.
Chicago-Zitierstil (17. Ausg.)Hallas, Charles H. The Care and Training of the Mentally Subnormal: With a Foreword by Ronald C. MacGillivray. 4.ed. Baltimore: Williams & Wilkins, 1970.
MLA-Zitierstil (9. Ausg.)Hallas, Charles H. The Care and Training of the Mentally Subnormal: With a Foreword by Ronald C. MacGillivray. 4.ed. Williams & Wilkins, 1970.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.