@book { Diversificationtoadegree,
    title = "Diversification to a degree",
    subtitle = "An exploratory study of students’ experience at four higher education institutions in China",
    author = "Kai {Yu}",
    year = "2010",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1135994"
}