@book { Viewfinding,
    title = "Viewfinding",
    author = "Cathy {Mullen} and Janice {Rahn}",
    year = "2010",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    doi = "10.3726/978-1-4539-0031-4",
    url = "https://www.peterlang.com/document/1050939"
}