@book { SchoolsIn,
    title = "School's In",
    subtitle = "The History of Summer Education in American Public Schools",
    author = "Kenneth M. {Gold}",
    year = "2002",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    url = "https://www.peterlang.com/document/1094559"
}