Perske, R. (1981). Hope for the families: New directions for parents of persons with retardation or other disabilities. Abingdon.
Čikaški stil citiranja (17. izdanje)Perske, Robert. Hope for the Families: New Directions for Parents of Persons with Retardation or Other Disabilities. Nashville: Abingdon, 1981.
MLA način citiranja (8. izdanje)Perske, Robert. Hope for the Families: New Directions for Parents of Persons with Retardation or Other Disabilities. Abingdon, 1981.
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