@book { Vygotskyin21stCenturySociety,
    title = "Vygotsky in 21st Century Society",
    author = "Pedro R. {Portes} and Spencer {Salas}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    url = "https://www.peterlang.com/document/1108581"
}