Lovitt, W. V. (1939). Elementary theory of equations. Prentice-Hall.
Cita Chicago (17th ed.)Lovitt, William Vernon. Elementary Theory of Equations. New York: Prentice-Hall, 1939.
Cita MLA (9th ed.)Lovitt, William Vernon. Elementary Theory of Equations. Prentice-Hall, 1939.
Atenció: Aquestes cites poden no estar 100% correctes.