Cita APA (7th ed.)

Barker, L. J. (1999). African Americans and the American political system. Prentice Hall.

Cita Chicago (17th ed.)

Barker, Lucius J. African Americans and the American Political System. Upper Saddle River, New Jersey: Prentice Hall, 1999.

Cita MLA (9th ed.)

Barker, Lucius J. African Americans and the American Political System. Prentice Hall, 1999.