Muchler, G., & Hofmann, K. (1992). Helmut Kohl, chancellor of German unity: A biography. Press and Information Office of the Federal Government.
Chicago-viite (17. p.)Muchler, Gunter, ja Klaus Hofmann. Helmut Kohl, Chancellor of German Unity: A Biography. Bonn: Press and Information Office of the Federal Government, 1992.
MLA-viite (9. p.)Muchler, Gunter, ja Klaus Hofmann. Helmut Kohl, Chancellor of German Unity: A Biography. Press and Information Office of the Federal Government, 1992.
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