Cita APA (7a ed.)

Ullmann, W. (1979). The origins of the Great Schism. University Microfilms International.

Cita Chicago Style (17a ed.)

Ullmann, Walter. The Origins of the Great Schism. Ann Arbor [etc.]: University Microfilms International, 1979.

Cita MLA (9a ed.)

Ullmann, Walter. The Origins of the Great Schism. University Microfilms International, 1979.