Duffy, E. T. (2009). The constitution of Shelley's poetry: The argument of language in Prometheus unbound. Anthem Press.

Duffy, Edward T. The Constitution of Shelley's Poetry: The Argument of Language in Prometheus Unbound. London ; New York: Anthem Press, 2009.

Duffy, Edward T. The Constitution of Shelley's Poetry: The Argument of Language in Prometheus Unbound. Anthem Press, 2009.