Cita APA (7th ed.)
Ludger Fiege, G. M. Electronic Commerce: Second International Workshop, WELCOM 2001 Heidelberg, Germany, November 16-17, 2001. Proceedings. Springer.
Cita Chicago (17th ed.)
Ludger Fiege, Gero Mühl. Electronic Commerce: Second International Workshop, WELCOM 2001 Heidelberg, Germany, November 16-17, 2001. Proceedings. Berlín, Alemania: Springer.
Cita MLA (9th ed.)
Ludger Fiege, Gero Mühl. Electronic Commerce: Second International Workshop, WELCOM 2001 Heidelberg, Germany, November 16-17, 2001. Proceedings. Springer.
Atenció: Aquestes cites poden no estar 100% correctes.