Litvin, F. L. (1994). Gear geometry and applied theory. PTR Prentice-Hall.
Cita Chicago (17th ed.)Litvin, Faydor L. Gear Geometry and Applied Theory. Englewood Cliffs, N.J: PTR Prentice-Hall, 1994.
Cita MLA (9th ed.)Litvin, Faydor L. Gear Geometry and Applied Theory. PTR Prentice-Hall, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.