APA (7th ed.) Citation

Symonds, J. A., Peters, R., & D'Arch Smith, T. (1974). Gabriel: A poem. Michael deHartington.

Chicago Style (17th ed.) Citation

Symonds, John Addington, Robert Peters, and Timothy D'Arch Smith. Gabriel: A Poem. London: Michael deHartington, 1974.

MLA (9th ed.) Citation

Symonds, John Addington, et al. Gabriel: A Poem. Michael deHartington, 1974.