@book { IbrahimibnYaqubsAccountofHisTraveltoSlavicCountriesasTransmittedbyAlBakri,
    title = "Ibrahim ibn Yaqub’s Account of His Travel to Slavic Countries as Transmitted by Al-Bakri",
    author = "Tadeusz {Kowalski} and Mustafa {Switat}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany"
}