(1981). Grinding wheel safety I [kasetvideo]. Chattanooga, Tenn. : Tel-A-Train.
Cita Chicago (17th ed.)Grinding Wheel Safety I [kasetvideo]. Chattanooga, Tenn. : Tel-A-Train, 1981.
Cita MLA (9th ed.)Grinding Wheel Safety I [kasetvideo]. Chattanooga, Tenn. : Tel-A-Train, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.