O' Brien,Derek. (2012). Ultimate Bournvita Quiz Contest Book of Knowledge (NA.). Rupa.
Chicagoスタイル(17版)引用形式O' Brien,Derek. Ultimate Bournvita Quiz Contest Book of Knowledge. NA. New delhi: Rupa, 2012.
MLA(9版)引用形式O' Brien,Derek. Ultimate Bournvita Quiz Contest Book of Knowledge. NA. Rupa, 2012.
警告: この引用は必ずしも正確ではありません.