To cite TGUITeaching in publications use:

Gerlinde Dinges, Alexander Kowarik, Bernhard Meindl, Matthias Templ (2011). An Open Source Approach for Modern Teaching Methods: The Interactive TGUI System. Journal of Statistical Software, 39(7), 1-19. URL http://www.jstatsoft.org/v39/i07/.

Corresponding BibTeX entry:

  @Article{,
    title = {An Open Source Approach for Modern Teaching Methods: The
      Interactive {TGUI} System},
    author = {Gerlinde Dinges and Alexander Kowarik and Bernhard Meindl
      and Matthias Templ},
    journal = {Journal of Statistical Software},
    year = {2011},
    volume = {39},
    number = {7},
    pages = {1--19},
    url = {http://www.jstatsoft.org/v39/i07/},
  }