Callahan, S. C., & Egan, E. (1989). Psychology and the works of mercy.
Lua i Stíl Chicago (17ú heag.)Callahan, Sidney Cornelia, agus Eileen Egan. Psychology and the Works of Mercy. 1989.
Lua MLA (8ú heag.)Callahan, Sidney Cornelia, agus Eileen Egan. Psychology and the Works of Mercy. 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.