@book { MessagesforEducationalLeadership,
    title = "Messages for Educational Leadership",
    subtitle = "The Constance E. Clayton Lectures 1998-2007",
    author = "Diana {Slaughter-Defoe}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    url = "https://www.peterlang.com/document/1109159"
}