Bellak, L., & Barten, H. H. (1969). Progress in community mental health. Grune & Stratton.
Lua i Stíl Chicago (17ú heag.)Bellak, Leopold, agus Harvey H. Barten. Progress in Community Mental Health. New York: Grune & Stratton, 1969.
Lua MLA (9ú heag.)Bellak, Leopold, agus Harvey H. Barten. Progress in Community Mental Health. Grune & Stratton, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.