@book { TeachingtheCausesoftheAmericanCivilWar18501861,
    title = "Teaching the Causes of the American Civil War, 1850-1861",
    author = "Michael E. {Karpyn}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    doi = "10.3726/b16178",
    url = "https://www.peterlang.com/document/1056885"
}