@Book{OL24151354M,
    title: {The greatest thing in the world},
    author: {Henry Drummond},
    publisher: {J. Pott \& co.},
    year: {1890},
    place: {New York},
}

@Work{OL17763691W,
    title: {La mujer cristiana},
    author: {François-Xavier Schouppe},
    first_publish_year: {1917}
}

@Work{OL5680223W,
    title: {Empresas morales},
    author: {Juan de Borja},
    first_publish_year: {1581}
}

@Work{OL6384118W,
    title: {Christian morals},
    author: {John Mason},
    first_publish_year: {1761}
}

@Author{OL1679227A,
    name: {John Mason},
    birth_date: {1706}
    , death_date: {1763}
}