@Book{OL33891995M,
    title: {The Hobbit},
    author: {J.R.R. Tolkien},
    publisher: {Mariner Books},
    year: {2012},
    place: {Boston},
}

@Author{OL26320A,
    name: {J.R.R. Tolkien},
    birth_date: {3 January 1892}
    , death_date: {2 September 1973}
}