@book { ADiscourseGrammarofMandarinChinese,
    title = "A Discourse Grammar of Mandarin Chinese",
    author = " {Chauncey C. Chu}",
    year = "1998",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    url = "https://www.peterlang.com/document/1087506"
}