@book { MultimediaLearning,
    title = "Multimedia Learning",
    subtitle = "Results and Perspectives",
    author = "Sanne {Dijkstra} and David {Jonassen} and Detlef {Sembill}",
    year = "2001",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1091242"
}