APA (7th ed.) Citation

Heer, F. (1963). El mundo medieval: Europa 1100-1350. Guadarrama.

Chicago Style (17th ed.) Citation

Heer, Friedrich. El Mundo Medieval: Europa 1100-1350. Madrid: Guadarrama, 1963.

MLA (9th ed.) Citation

Heer, Friedrich. El Mundo Medieval: Europa 1100-1350. Guadarrama, 1963.