@book { FrenchInvestmentinColonialCameroon,
    title = "French Investment in Colonial Cameroon",
    author = "Martin {Atangana}",
    year = "2009",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    doi = "10.3726/978-1-4539-0407-7",
    url = "https://www.peterlang.com/document/1050850"
}