Rupp, W. J. (1940). Notes on the history of a Sunday school: Commemorating the one hundredth anniversary of the Sunday school of Great Swamp Reformed church. [Spinnerstown, Pa.]: The Centennial committee.

Rupp, William J. Notes On the History of a Sunday School: Commemorating the One Hundredth Anniversary of the Sunday School of Great Swamp Reformed Church. [Spinnerstown, Pa.]: The Centennial committee, 1940.

Rupp, William J. Notes On the History of a Sunday School: Commemorating the One Hundredth Anniversary of the Sunday School of Great Swamp Reformed Church. [Spinnerstown, Pa.]: The Centennial committee, 1940.