Cita APA (7a ed.)

Pilapil, V. R. (1969). Alfonso XIII. Twayne.

Cita Chicago Style (17a ed.)

Pilapil, Vicente R. Alfonso XIII. New York: Twayne, 1969.

Cita MLA (9a ed.)

Pilapil, Vicente R. Alfonso XIII. Twayne, 1969.