APA
Kugel R. B., Parsons M. H., .Children of deprivation : changing the course of familial retardation. Washington: U.S. Department of Health Education.
Chicago
Kugel Robert B, Parsons Mabel H, .Children of deprivation : changing the course of familial retardation. Washington: U.S. Department of Health Education.
Harvard
Kugel R. B., Parsons M. H., .Children of deprivation : changing the course of familial retardation. Washington: U.S. Department of Health Education.
MLA
Kugel Robert B, Parsons Mabel H, .Washington: U.S. Department of Health Education. .