Woodlock, T. F., Seligman, E. R. A., Vanderlip, F. A., Hepburn, A. B., Strauss, A., Nash, W. A., . . . Perkins, G. W. (1908). The Currency problem and the present financial situation: A series of addresses delivered at Columbia University, 1907-1908. Columbia University Press.

Woodlock, Thomas F., Edwin R. A. Seligman, Frank A. Vanderlip, A. Barton Hepburn, Albert Strauss, William Alexander Nash, James Graham Cannon, Paul M. Warburg, và George W. Perkins. The Currency Problem and the Present Financial Situation: A Series of Addresses Delivered at Columbia University, 1907-1908. New York: Columbia University Press, 1908.

Woodlock, Thomas F., et al. The Currency Problem and the Present Financial Situation: A Series of Addresses Delivered at Columbia University, 1907-1908. Columbia University Press, 1908.