APA

Nolthenius H., . (1968). Duecento; the late Middle Ages in Italy. New York: McGraw-Hill.

Chicago

Nolthenius Hélène, . 1968. Duecento; the late Middle Ages in Italy. New York: McGraw-Hill.

Harvard

Nolthenius H., . (1968). Duecento; the late Middle Ages in Italy. New York: McGraw-Hill.

MLA

Nolthenius Hélène, . Duecento; the late Middle Ages in Italy. New York: McGraw-Hill. 1968.