Cross, H., & INTEMAC. (1997). Ingenieros y torres de marfil: = Engineers and ivory towers (Ed. facs.). Madrid: INTEMAC.
Cita MLA (8 ed.) (Copiar al portapapeles)Cross, Hardy, and INTEMAC. Ingenieros Y Torres De Marfil: = Engineers and Ivory Towers. Ed. facs. Madrid: INTEMAC , 1997.