Cita APA (7a ed.)

Keller, J. E. (1946). The exemplum in Spain. [s.n.].

Cita Chicago Style (17a ed.)

Keller, John E. The Exemplum in Spain. Chapel Hill: [s.n.], 1946.

Cita MLA (9a ed.)

Keller, John E. The Exemplum in Spain. [s.n.], 1946.