アメリカ合衆国国家情報会議 - NIC Global Trends 2030 ^ a b c d e f g h i j k l m n o p q r Peter Howard, B.A., B.S., M.A., Ph.D. Assistant Professor, School of International
includes peak positions in the United States, Canada, United Kingdom, Germany, Europe, Japan, France, Switzerland, Netherlands, Australia, and New Zealand
1996, p. 234. ^ a b c d e f g h i j k l m n o p q rs t u v w Zabecki 2014, p. 1614. ^ Toliver & Constable 1998, p. 389. ^ a b c d e f g h i j k l m n o p
1992-93 [脚注の使い方] ^ a b c d e f g h i j k l m n o p q rs t u “Rudi Völler, il tedesco volante: la Roma, la Champions col Marsiglia e i Mondiali del 1990”