Barton Perry, R. (1950). General theory of value: Its meaning and basic principles construed in terms of interest. Harvard Univ. Press.
Lua i Stíl Chicago (17ú heag.)Barton Perry, Ralph. General Theory of Value: Its Meaning and Basic Principles Construed in Terms of Interest. Cambridge, Mass.: Harvard Univ. Press, 1950.
Lua MLA (8ú heag.)Barton Perry, Ralph. General Theory of Value: Its Meaning and Basic Principles Construed in Terms of Interest. Harvard Univ. Press, 1950.
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