Cita APA

Williams, E. R., & Williams, E. R. (1903). Hill towns of Italy. Boston: Houghton Mifflin.

Citación estilo Chicago

Williams, Egerton R., y Egerton R. Williams. Hill Towns of Italy. Boston: Houghton Mifflin, 1903.

Cita MLA

Williams, Egerton R., y Egerton R. Williams. Hill Towns of Italy. Boston: Houghton Mifflin, 1903.