Gaya APA
      Highfield, Roger. (2002).
    The science of Harry Potter: how magic really works (cet.1).
    United States of America:
  Penguin Publishing Group.
  
Gaya Chicago
      Highfield, Roger.
    The science of Harry Potter: how magic really works.
    cet.1
    United States of America:
  Penguin Publishing Group,
  2002.
  Text.
  
Gaya MLA
      Highfield, Roger.
    The science of Harry Potter: how magic really works.
    cet.1
    United States of America:
  Penguin Publishing Group,
  2002.
  Text.
  
Gaya Turabian
      Highfield, Roger.
    The science of Harry Potter: how magic really works.
    cet.1 
    United States of America:
  Penguin Publishing Group,
  2002.
  Print.