digraph G {
  Guido [shape = box, style = filled, color = blue];
  Iznogood [shape = box];
  Floris [shape = box];
  Guus [shape = box];
  Unknown [shape = box, label = "?"];
  JeanEtienne [shape = box, label = "Jean-Etienne"];
  EditorInChief [label = "Editor in chief"];
  FrenchTeam [label = "French Team"];
  DutchTeam [label = "Dutch Team"];
  ContactPersonForEnglish [label = "Contact Person for English"];
  GermanTeam [label = "German Team"];
  
  EditorInChief -> Guido;
  EditorInChief -> FrenchTeam [style = bold];
  EditorInChief -> DutchTeam [style = bold];
  EditorInChief -> ContactPersonForEnglish [style = bold];
  EditorInChief -> GermanTeam [style = bold];
  
  edge [color = red]; /* defines the team leaders */
  FrenchTeam -> Iznogood;
  DutchTeam -> Floris;
  DutchTeam -> Guus;
  ContactPersonForEnglish -> Guido;
  GermanTeam -> Unknown;
  
  edge [color = green]; /* defines the authors */
  Guido -> Guido;
  Unknown -> Guido;
  Guido -> Iznogood;
  Iznogood -> Iznogood;
  Guido -> JeanEtienne;
  Iznogood -> JeanEtienne;
}