Coba jelasin Sumber dari James Pollock dong

The Sunday School Movement and the American Sunday School Union by Edwin Wilbur Rice: Union Press, 1917.

The Torch and the Flag by Galbraith Hall Todd; Union Press, 1966.

United States Mint Annual Report, 1863.

In Memoriam, James Pollack: published privately by the family of James Pollack, c. 1890.