New York: Robert Appleton Company, 1912.

New York: Robert Appleton Company, 1910.

New York: Robert Appleton Company, 1909.

New York: Robert Appleton Company 1911.

Robert Appleton Company.

New York: Robert Appleton Company, 1907.

The Catholic Encyclopedia, 1912, Robert Appleton Company.

Robert Appleton Company, 1911.

I New York: The Robert Appleton Company, 1907.

New York: Robert Appleton Company, 1908.