Duffy, E. T. (2009). The constitution of Shelley's poetry: The argument of language in Prometheus unbound. Anthem Press.
Lua i Stíl Chicago (17ú heag.)Duffy, Edward T. The Constitution of Shelley's Poetry: The Argument of Language in Prometheus Unbound. London ; New York: Anthem Press, 2009.
Lua MLA (9ú heag.)Duffy, Edward T. The Constitution of Shelley's Poetry: The Argument of Language in Prometheus Unbound. Anthem Press, 2009.
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