I don't mind if the sources are in german language. :D
And by the way, I also cite sources that, for example, are just available in specific libraries or online through a university affiliation like jstor.org. Don't worry about this. ;)
And welcome back to academic "Hamsterrad". I feel with you.
The thing is, the lectures aren't online. We get them as printed out PowerPoint presentations 🙈
Okay, I understand. :D