@Work{OL2210571W,
    title: {100 ways to enhance self-concept in the classroom},
    author: {Jack Canfield and Harold Wells},
    first_publish_year: {1976}
}

@Author{OL509912A,
    name: {Jack Canfield},
    birth_date: {1944}
}
@Author{OL457392A,
    name: {Harold Wells},
}