APA (7th ed.) Citation

Bolton, S. K. (1972). Famous voyagers and explorers. Books for Libraries Press.

Chicago Style (17th ed.) Citation

Bolton, Sarah Knowles. Famous Voyagers and Explorers. Freeport, N.Y.: Books for Libraries Press, 1972.

MLA (9th ed.) Citation

Bolton, Sarah Knowles. Famous Voyagers and Explorers. Books for Libraries Press, 1972.