Nelson,Michael. (1990). The Presidency and the political system. Washington: Congressional Quarterly.
Chicago-стиль цитированияNelson,Michael. The Presidency and the Political System. Washington: Congressional Quarterly, 1990.
MLA-цитированиеNelson,Michael. The Presidency and the Political System. Washington: Congressional Quarterly, 1990.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.