Hager, J. P. (1993). EPD Congress 1993. TMS Minerals. Metals. Materials.
Cita Chicago (17th ed.)Hager, John P. EPD Congress 1993. TMS Minerals. Metals. Materials, 1993.
Cita MLA (9th ed.)Hager, John P. EPD Congress 1993. TMS Minerals. Metals. Materials, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.