Cita APA (7th ed.)

Villadolid, O. S., & Villadolid, A. C. (2001). The impeachment of a president. s.n.].

Cita Chicago (17th ed.)

Villadolid, Oscar S., i Alice Colet Villadolid. The Impeachment of a President. [S.l: s.n.], 2001.

Cita MLA (9th ed.)

Villadolid, Oscar S., i Alice Colet Villadolid. The Impeachment of a President. s.n.], 2001.