For specific biographical information, see Michaud n.d. Michaud, Derek (n.d.). "Karl Rahner (1904–1984)". In Wildman, Wesley (ed.). Boston Collaborative Encyclopedia of Western Theology. Boston: Boston University. Retrieved 22 October 2017.
Michaud n.d. Michaud, Derek (n.d.). "Karl Rahner (1904–1984)". In Wildman, Wesley (ed.). Boston Collaborative Encyclopedia of Western Theology. Boston: Boston University. Retrieved 22 October 2017.
For the whole Christology section, refer to Michaud n.d. Michaud, Derek (n.d.). "Karl Rahner (1904–1984)". In Wildman, Wesley (ed.). Boston Collaborative Encyclopedia of Western Theology. Boston: Boston University. Retrieved 22 October 2017.
Hentz 1991; Michaud n.d. Hentz, Otto H. (1991). "Anticipating Jesus Christ: An Account of Our Hope". In O'Donovan, Leo J. (ed.). A World of Grace: An Introduction to the Themes and Foundations of Karl Rahner's Theology. New York: Crossroad. Michaud, Derek (n.d.). "Karl Rahner (1904–1984)". In Wildman, Wesley (ed.). Boston Collaborative Encyclopedia of Western Theology. Boston: Boston University. Retrieved 22 October 2017.
Marmion, Declan (March 2017). "Karl Rahner, Vatican II, and the Shape of the Church". Theological Studies. 78 (1): 25–48. doi:10.1177/0040563916681992.
Rahner, Karl (July 1979). "Foundations of Christian Faith: An Introduction to the Idea of Christianity". Religious Studies Review. 5 (3): 190–199. doi:10.1111/j.1748-0922.1979.tb00215.x.
Hardon, John A. (1998). "Defending the Faith". Lombard, Illinois: Real Presence Eucharistic Education and Adoration Association. Retrieved 22 October 2017.
Rahner, Karl, Kirche und Sakramente. (Quaestiones Disputatae, Band 10.) Freiburg, Herder, 1961. 8°, 104 S. - Engl, brosch.
DM 6,80 (Münchener Theologische Zeitschrift.
Quote: "Since the Church is the original sacrament (Ursakrament), the existence of a sacrament does not necessarily and in every case have to be based on a word in which the historical Jesus speaks of a particular sacrament.."
Mawhinney 1968. Mawhinney, John J. (1968). "The Concept of Mystery in Karl Rahner's Philosophical Theology". Union Seminary Quarterly Review. 24 (1): 17–30. ISSN0362-1545.