APA Style
      Grafenstein, M, V. (2018).
    The Principle of Purpose Limitation in Data Protection Laws : The Risk-based Approach, Principles, and Private Standards as Elements for Regulating Innovation (1).
    Baden-Baden:
  Nomos Verlagsgesellschaft mbH & Co. KG.
  
MLA Style
      Grafenstein, Maximilian, Von.
    "The Principle of Purpose Limitation in Data Protection Laws : The Risk-based Approach, Principles, and Private Standards as Elements for Regulating Innovation".
    1
    Baden-Baden:
  Nomos Verlagsgesellschaft mbH & Co. KG,
  2018.
  Text.