APA (7th ed.) Citation

Cowper, W., Baird, J. D., & Ryskamp, C. (1995). The poems of William Cowper. Clarendon.

Chicago Style (17th ed.) Citation

Cowper, William, John D. Baird, and Charles Ryskamp. The Poems of William Cowper. Oxford: Clarendon, 1995.

MLA (9th ed.) Citation

Cowper, William, et al. The Poems of William Cowper. Clarendon, 1995.