@book { Variationplurilinguismeetvaluationenfranaislanguetrangre,
    title = "Variation, plurilinguisme et évaluation en français langue étrangère",
    author = "Laurent {Gajo} and Jean-Marc {Luscher} and Isabelle {Racine} and Francoise {Zay}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b15906",
    url = "https://www.peterlang.com/document/1110797"
}