Whately, R. (1966). Introductory lectures on political economy. A. M. Kelley.
Lua i Stíl Chicago (17ú heag.)Whately, Richard. Introductory Lectures on Political Economy. New York: A. M. Kelley, 1966.
Lua MLA (9ú heag.)Whately, Richard. Introductory Lectures on Political Economy. A. M. Kelley, 1966.
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