Schurmann, H. (1986). Principles of Christian Morality (ed.). Ignatius Press.
Lua i Stíl Chicago (17ú heag.)Schurmann, Heinz. Principles of Christian Morality. ed. San Francisco: Ignatius Press, 1986.
Lua MLA (9ú heag.)Schurmann, Heinz. Principles of Christian Morality. ed. Ignatius Press, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.