Cita APA (7a ed.)

Ombres, R. (1978). The theology of purgatory. The Mercier Press.

Cita Chicago Style (17a ed.)

Ombres, Robert. The Theology of Purgatory. Dublin [etc.]: The Mercier Press, 1978.

Cita MLA (9a ed.)

Ombres, Robert. The Theology of Purgatory. The Mercier Press, 1978.