APA (7th ed.) Citation

Browning, R., Dowden, E., & Cook, A. K. (1912). The ring and the book: (a poem). O.U.P..

Chicago Style (17th ed.) Citation

Browning, Robert, Edward Dowden, and A K. Cook. The Ring and the Book: (a Poem). Lond.: O.U.P., 1912.

MLA (8th ed.) Citation

Browning, Robert, et al. The Ring and the Book: (a Poem). O.U.P., 1912.