@book { DesignandManagementoftheVirtualLearningEnvironmentforForeignLanguageInstructioninAdultLearnerGroups,
    title = "Design and Management of the Virtual Learning Environment for Foreign Language Instruction in Adult Learner Groups",
    author = "Robert {Oliwa}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b17657",
    url = "https://www.peterlang.com/document/1059371"
}