Cita APA (7th ed.)
Gregg, J. The Alloys of Iron and Tungsten. McGraw-Hill.
Cita Chicago (17th ed.)
Gregg, J.L. The Alloys of Iron and Tungsten. Nueva York, EUA: McGraw-Hill.
Cita MLA (9th ed.)
Gregg, J.L. The Alloys of Iron and Tungsten. McGraw-Hill.
Atenció: Aquestes cites poden no estar 100% correctes.