SpringerLink (Online service), Fiege, L., Mühl, G., & Wilhelm, U. (2001). Electronic Commerce: Second International Workshop, WELCOM 2001 Heidelberg, Germany, November 16-17, 2001. Proceedings (1st ed. 2001.). Springer Berlin Heidelberg : Imprint: Springer. https://doi.org/10.1007/3-540-45598-1
Chicago Style (17th ed.) CitationSpringerLink (Online service), Ludger Fiege, Gero Mühl, and Uwe Wilhelm. Electronic Commerce: Second International Workshop, WELCOM 2001 Heidelberg, Germany, November 16-17, 2001. Proceedings. 1st ed. 2001. Berlin, Heidelberg: Springer Berlin Heidelberg : Imprint: Springer, 2001. https://doi.org/10.1007/3-540-45598-1.
MLA (8th ed.) CitationSpringerLink (Online service), et al. Electronic Commerce: Second International Workshop, WELCOM 2001 Heidelberg, Germany, November 16-17, 2001. Proceedings. 1st ed. 2001. Springer Berlin Heidelberg : Imprint: Springer, 2001. https://doi.org/10.1007/3-540-45598-1.