Heer, E. Friedrichsfeld.
Cita Chicago (17th ed.)Heer, Erwin. Friedrichsfeld.
Cita MLA (8th ed.)Heer, Erwin. Friedrichsfeld.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)
Heer, E. Friedrichsfeld.
Cita Chicago (17th ed.)Heer, Erwin. Friedrichsfeld.
Cita MLA (8th ed.)Heer, Erwin. Friedrichsfeld.