Clark, W. H. (1967). The politics of the Common Market. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Clark, William Hartley. The Politics of the Common Market. Englewood Cliffs, N.J: Prentice-Hall, 1967.
Lua MLA (9ú heag.)Clark, William Hartley. The Politics of the Common Market. Prentice-Hall, 1967.
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