@book { DiagnosticOralSkillsAssessment,
    title = "Diagnostic Oral Skills Assessment",
    subtitle = "Developing Flexible Guidelines for Formative Speaking Tests in EFL Classrooms Worldwide",
    author = "JoAnn {Salvisberg-Smith}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    doi = "10.3726/978-3-0351-0229-1",
    url = "https://www.peterlang.com/document/1052212"
}