APA Style
      Hafner, J, F, ,, W, K, H, ,, C, M. (2019).
    Statistics of Financial Markets
An Introduction (5).
    Springer Cham:
  Springer Cham.
  
MLA Style
      Hafner, Jürgen, Franke, ,, Wolfgang, Karl, Härdle, ,, Christian, Matthias.
    "Statistics of Financial Markets
An Introduction".
    5
    Springer Cham:
  Springer Cham,
  2019.
  Text.