APA (7th ed.) Citation

Lockhart, J. G., & Southey, R. (1907). The Spanish ballads. Century.

Chicago Style (17th ed.) Citation

Lockhart, J. G., and Robert Southey. The Spanish Ballads. New York: Century, 1907.

MLA (9th ed.) Citation

Lockhart, J. G., and Robert Southey. The Spanish Ballads. Century, 1907.