Freedman, D. X. (1981). The yearbook of psychiatry and applied mental health 1981. YearBook Medical.
Lua i Stíl Chicago (17ú heag.)Freedman, Daniel X. The Yearbook of Psychiatry and Applied Mental Health 1981. YearBook Medical, 1981.
Lua MLA (9ú heag.)Freedman, Daniel X. The Yearbook of Psychiatry and Applied Mental Health 1981. YearBook Medical, 1981.
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