N. Scott, Arnold (7 tháng 4 năm 2011). Imposing Values: Liberalism and Regulation. Oxford University Press. tr. 3. ISBN978-0-19-970529-0. Truy cập ngày 27 tháng 11 năm 2015."Modern liberalism occupies the left-of-center in the traditional political spectrum and is represented by the Democratic Party in the United States".
Starr P. (March 1, 2007). "War and Liberalism." The New Republic."“Starr, P. (1 March 2007). "War and Liberalism". The New Republic”. Truy cập ngày 2 tháng 8 năm 2007. "Liberalism wagers that a state ... can be strong but constrained – strong because constrained. ... Rights to education and other requirements for human development and security aim to advance the opportunity and personal dignity of minorities and to promote a creative and productive society. To guarantee those rights, Democrats support a wider social and economic role for the state, counterbalanced by more robust guarantees of civil liberties and a wider social system of checks and balances anchored in an independent press and pluralistic society."
