Cita APA (7th ed.)
Mannesmann-Export. Manesmann tubular steel construction. The Mannesmann.
Cita Chicago (17th ed.)
Mannesmann-Export. Manesmann Tubular Steel Construction. Hanover,Germany: The Mannesmann.
Cita MLA (9th ed.)
Mannesmann-Export. Manesmann Tubular Steel Construction. The Mannesmann.
Atenció: Aquestes cites poden no estar 100% correctes.