Cita APA (7th ed.)

Ingersoll, D. E. (2001). The philosophic roots of modern ideology: Liberalism, communism, fascism, islamism (3d ed.). Prentice Hall.

Cita Chicago (17th ed.)

Ingersoll, David E. The Philosophic Roots of Modern Ideology: Liberalism, Communism, Fascism, Islamism. 3d ed. Upper Sadle River, New Jersey: Prentice Hall, 2001.

Cita MLA (9th ed.)

Ingersoll, David E. The Philosophic Roots of Modern Ideology: Liberalism, Communism, Fascism, Islamism. 3d ed. Prentice Hall, 2001.