@book { GnrositetGratitude,
    title = "Générosité et Gratitude",
    author = "Dale M. {Schlitt}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    doi = "10.3726/978-1-4539-0248-6",
    url = "https://www.peterlang.com/document/1051154"
}