Cita APA (7a ed.)

Olson, J. E., & Bourne, E. G. (1906). The Northmen, Columbus, and Cabot, 985-1503. Charles Scribner's Sons.

Cita Chicago Style (17a ed.)

Olson, Julius E., y Edward Gaylord Bourne. The Northmen, Columbus, and Cabot, 985-1503. New York: Charles Scribner's Sons, 1906.

Cita MLA (9a ed.)

Olson, Julius E., y Edward Gaylord Bourne. The Northmen, Columbus, and Cabot, 985-1503. Charles Scribner's Sons, 1906.