Informazzjoni minn organizzazzjoni tal-arti (Verifikat minn Operabase)
How to Become Rich and Happy? by Spoliansky, Ħad 26 Mar 2017, Minn (2017/2017), Immexxi minn Thomas Fiedler, Jan Dvořák,, Surmast Direttur Matthew Toogood, Nationaltheater, Mannheim, Germany