@unpublished{,
    author = {Harder, Sonja},
    title = {E-Book-Workshop, Teil 1},
    editor = {},
    booktitle = {},
    series = {},
    journal = {},
    address = {},
    publisher = {},
    edition = {},
    year = {2021},
    isbn = {},
    volume = {},
    number =  {},
    pages = {},
    url = {},
    doi = {},
    keywords = {},
    abstract = {},
    note = {},
    
    
    
}