APA
Zerdick A., Artope A., Zerdick A. & Schrape K. (2000). E-conomics. New York: Springer -verlag.
Chicago
Zerdick Axel, Artope Alexander, Zerdick Axel and Schrape Klaus. 2000. E-conomics. New York: Springer -verlag.
Harvard
Zerdick A., Artope A., Zerdick A. and Schrape K. (2000). E-conomics. New York: Springer -verlag.
MLA
Zerdick Axel, Artope Alexander, Zerdick Axel and Schrape Klaus. E-conomics. New York: Springer -verlag. 2000.