Lewis, J. A., & Lewis, M. D. (1991). Management of human service programs (2nd ed.). Brooks/Cole.
Lua i Stíl Chicago (17ú heag.)Lewis, Judith A., agus Michael D. Lewis. Management of Human Service Programs. 2nd ed. Pacific Grove: Brooks/Cole, 1991.
Lua MLA (9ú heag.)Lewis, Judith A., agus Michael D. Lewis. Management of Human Service Programs. 2nd ed. Brooks/Cole, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.