Levering, M., & O'Regan, C. (2019). The achievement of Hans Urs von Balthasar: An introduction to his trilogy. The Catholic University of America Press.
Čikaški stil citiranja (17. izdanje)Levering, Matthew, i Cyril O'Regan. The Achievement of Hans Urs Von Balthasar: An Introduction to His Trilogy. Washington, D.C.: The Catholic University of America Press, 2019.
MLA način citiranja (9. izdanje)Levering, Matthew, i Cyril O'Regan. The Achievement of Hans Urs Von Balthasar: An Introduction to His Trilogy. The Catholic University of America Press, 2019.
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