Cita APA (7a ed.)

Keefe, D. J. (1967). The Method of Paul Tillich's theological System. Pontificia Universitas Gregoriana. Facultas Theologica.

Cita Chicago Style (17a ed.)

Keefe, Donald J. The Method of Paul Tillich's Theological System. Roma: Pontificia Universitas Gregoriana. Facultas Theologica, 1967.

Cita MLA (9a ed.)

Keefe, Donald J. The Method of Paul Tillich's Theological System. Pontificia Universitas Gregoriana. Facultas Theologica, 1967.