Here are some sources of Wilson's thoughts on the subject:
United States Senate Doc. 23, 76th Congress, 1st Session
http://www.archive.org/details/NationalEconomyAndTheBankingSystemOfTheUnitedStatesPage 100 Woodrow Wilson, 1916, said:
"A great industrial nation is controlled by its system of credit. Our system of credit is concentrated. The growth of the Nation, therefore, and all our activities are in the hands of a few men... We have come to be one of the worst ruled, one of the most completely controlled and dominated, governments in the civilized world—no longer a government by free opinion, no longer a government by conviction and the vote of the majority, but a government by the opinion and the duress of small groups of dominant men."
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as for the first part of the quote (which has been incorrectly tagged onto the quote above)
here is a source
http://books.google.com/books?lr=&q=%22unhappy+man%22+%22woodrow+wilson%22+american+mercury&btnG=Search+BooksWoodrow Wilson: "I am a most unhappy man; unwittingly I have ruined my country..."
The American Mercury, founded 1924 by George Jean Nathan, Henry Louis Mencken, p 56 Volume 111, Issue 516 - Volume 112, Issue 523
"President Woodrow Wilson-( After breaking with the engineers of the Fed Act, and near his death), "I am a most unhappy man; unwittingly I have ruined my ..."
The American Mercury was an American magazine published from 1924 to 1981. It was founded as the brainchild of H. L. Mencken and drama critic George Jean Nathan. The magazine featured writing by some of the most important writers in the United States through the 1920s and 1930s. (Wikipedia)