著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL "United States. President ( : Bush) and Piper, Daniel",The fall of the Berlin Wall and the unification of Germany,,Primary Source Media : Gale Cengage Learning,2008,The papers of President George H.W. Bush,,,,https://cir.nii.ac.jp/crid/1130000794539390976