Valle, Y., M. Strasser, and V. Sandino. “Assessment of Learning of Latin American History Acquired by the Nicaraguan School Students in the Year 2006”. Universitas (León): Revista Científica De La UNAN León, vol. 2, no. 1, July 2008, pp. 64-69, doi:10.5377/universitas.v2i1.1646.