APA (7th ed.) Citation

Humble, R. (1991). The voyages of Columbus. Franklin Watts.

Chicago Style (17th ed.) Citation

Humble, Richard. The Voyages of Columbus. London: Franklin Watts, 1991.

MLA (9th ed.) Citation

Humble, Richard. The Voyages of Columbus. Franklin Watts, 1991.

Warning: These citations may not always be 100% accurate.