@book { Structureettchesdunorganismenationaldetourisme,
    title = "Structure et tâches d'un organisme national de tourisme",
    author = "Jean-Louis {Aeschlimann}",
    year = "1969",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1069164"
}