International, W. B. C. (1978). Science Year: The world book science annual. U.S.A.
シカゴスタイル引用形International, World Book Childcraft. Science Year: The World Book Science Annual. Chicago: U.S.A, 1978.
MLA引用形式International, World Book Childcraft. Science Year: The World Book Science Annual. U.S.A, 1978.
警告: この引用は必ずしも正確ではありません.