Cita APA (7a ed.)

Pérez Unzueta, J. I. (1973). Grace against corruption. [s.n.].

Cita Chicago Style (17a ed.)

Pérez Unzueta, José Ignacio. Grace Against Corruption. [S.l.]: [s.n.], 1973.

Cita MLA (9a ed.)

Pérez Unzueta, José Ignacio. Grace Against Corruption. [s.n.], 1973.