APA (7th ed.) Citation

Lockhart, J. G. (1969). Ancient Spanish ballads (New ed., rev.). B. Blom.

Chicago Style (17th ed.) Citation

Lockhart, J. G. Ancient Spanish Ballads. New ed., rev. New York: B. Blom, 1969.

MLA (9th ed.) Citation

Lockhart, J. G. Ancient Spanish Ballads. New ed., rev. B. Blom, 1969.