Cita APA (7th ed.)

Del Prado, M. G. "The importance of history". s.n.

Cita Chicago (17th ed.)

Del Prado, Mariano Goyena. "The Importance of History". s.l: s.n.

Cita MLA (9th ed.)

Del Prado, Mariano Goyena. "The Importance of History". s.n.