@book { LearninginPlaces,
    title = "Learning in Places",
    subtitle = "The Informal Education Reader",
    author = "Zvi {Bekerman} and Nicholas C. {Burbules} and Diana {Silberman-Keller}",
    year = "2006",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    url = "https://www.peterlang.com/document/1102019"
}