Gaya APA

DUBY, G., POSTAN, C, [. (1990). Rural economy and country life in the medieval west . Columbia, SC: Uniersity of South Carolina.

Gaya MLA

DUBY, Gearges., POSTAN, Cynthia, [penerj.]. "Rural economy and country life in the medieval west". Columbia, SC: Uniersity of South Carolina, 1990. Text.