APA (7th ed.) Citation

Ball, E. R., & Dunbar, P. L. (1909). Who knows: Song. M. Witmark.

Chicago Style (17th ed.) Citation

Ball, Ernest R., and Paul Laurence Dunbar. Who Knows: Song. New York: M. Witmark, 1909.

MLA (9th ed.) Citation

Ball, Ernest R., and Paul Laurence Dunbar. Who Knows: Song. M. Witmark, 1909.