Hawking, L., & Hawking, S. W. G. (2007). George's secret key to the universe. Doubleday.
シカゴスタイル引用形Hawking, Lucy, , Stephen W. Galfard Hawking. George's Secret Key to the Universe. London: Doubleday, 2007.
MLA引用形式Hawking, Lucy, , Stephen W. Galfard Hawking. George's Secret Key to the Universe. Doubleday, 2007.
警告: この引用は必ずしも正確ではありません.