Witmer, H. L. (1963). Independent adoptions: A follow-up study. Russell Sage Foundation.
Citazione stile Chigago Style (17a edizione)Witmer, Helen Leland. Independent Adoptions: A Follow-up Study. New York: Russell Sage Foundation, 1963.
Citatione MLA (8a ed.)Witmer, Helen Leland. Independent Adoptions: A Follow-up Study. Russell Sage Foundation, 1963.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.