APA

Gies J., Gies F. C., .Life in a medieval city. New York: Harper Perennial.

Chicago

Gies Joseph, Gies Frances Coaut, .Life in a medieval city. New York: Harper Perennial.

Harvard

Gies J., Gies F. C., .Life in a medieval city. New York: Harper Perennial.

MLA

Gies Joseph, Gies Frances Coaut, .New York: Harper Perennial. .