@Book{OL23871792M,
    title: {Challenges for game designers},
    author: {Brenda Brathwaite},
    publisher: {Course Technology/Cengage Learning},
    year: {2009},
    place: {Boston, MA},
}

@Book{OL3382125M,
    title: {Game design workshop},
    author: {Tracy Fullerton},
    publisher: {CMP},
    year: {2004},
    place: {San Francisco, Calif},
}

@Author{OL1421763A,
    name: {Tracy Fullerton},
    birth_date: {21 June 1965}
}