@Book{OL355708M,
    title: {Who moved my cheese?},
    author: {Spencer Johnson},
    publisher: {Putnam},
    year: {1998},
    place: {New York},
}

@Work{OL1168007W,
    title: {Animal Farm},
    author: {George Orwell},
    first_publish_year: {1945}
}

@Author{OL118077A,
    name: {George Orwell},
    birth_date: {25 June 1903}
    , death_date: {21 January 1950}
}