APA (7th ed.) Citation

Cowper, W., Willmott, R. A., & Foster, M. B. (1860). The poetical works of William Cowper (A new edition.). George Routledge and Sons.

Chicago Style (17th ed.) Citation

Cowper, William, Robert Aris Willmott, and Myles Birket Foster. The Poetical Works of William Cowper. A new edition. London ; New York: George Routledge and Sons, 1860.

MLA (9th ed.) Citation

Cowper, William, et al. The Poetical Works of William Cowper. A new edition. George Routledge and Sons, 1860.