Boulding, K. E. (1958). Principles of economic policy. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Boulding, Kenneth Ewart. Principles of Economic Policy. Engelwood Cliffs, N.J: Prentice-Hall, 1958.
Lua MLA (9ú heag.)Boulding, Kenneth Ewart. Principles of Economic Policy. Prentice-Hall, 1958.
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