APA

Ore Ø., . (1948). Number theory and its history. New York: McGraw-Hill Book Co.

Chicago

Ore Øystein, . 1948. Number theory and its history. New York: McGraw-Hill Book Co.

Harvard

Ore Ø., . (1948). Number theory and its history. New York: McGraw-Hill Book Co.

MLA

Ore Øystein, . Number theory and its history. New York: McGraw-Hill Book Co. 1948.