APA

Olson J. E., Bourne E. G., . (1967). The Northmen, Columbus and Cabot, 985-1503: The voyages of the Norseman, ed. by Julius E. Olson [and] The voyages of Columbus and of John Cabot, ed. by Edward Gaylord Bourne. New York: Barnes & Noble.

Chicago

Olson Julius Emil, Bourne Edward Gaylord, . 1967. The Northmen, Columbus and Cabot, 985-1503: The voyages of the Norseman, ed. by Julius E. Olson [and] The voyages of Columbus and of John Cabot, ed. by Edward Gaylord Bourne. New York: Barnes & Noble.

Harvard

Olson J. E., Bourne E. G., . (1967). The Northmen, Columbus and Cabot, 985-1503: The voyages of the Norseman, ed. by Julius E. Olson [and] The voyages of Columbus and of John Cabot, ed. by Edward Gaylord Bourne. New York: Barnes & Noble.

MLA

Olson Julius Emil, Bourne Edward Gaylord, . The Northmen, Columbus and Cabot, 985-1503: The voyages of the Norseman, ed. by Julius E. Olson [and] The voyages of Columbus and of John Cabot, ed. by Edward Gaylord Bourne. New York: Barnes & Noble. 1967.