@Book{OL25929157M,
    title: {PURPLE HIBISCUS},
    author: {Chimamanda Ngozi Adichie},
    publisher: {Algonquin books },
    year: {2003},
}

@Work{OL3275619W,
    title: {Early childhood mathematics},
    author: {Susan Sperry Smith},
    first_publish_year: {1997}
}

@Author{OL534686A,
    name: {Susan Sperry Smith},
}