Currently I'm using biblatex (with biber as back-end - latest version) for my latex project. The latex skeleton I am using can be found here: https://ftp.isds.tugraz.at/pub/keith/thesis/thesis.zip.
At the moment citations are made using
\textcite{}
or \parencite{}
for all entry types e.g. @article, @book, @booklet. Unfortunately online sources (@booklet) should be cited using footnotes and not be part of the bibliography. Is there a possibility to create a latex command or custom citation command to accomplish that?