Cita APA (7th ed.)

Young, O. R. (1968). Systems of political science. Prentice-Hall.

Cita Chicago (17th ed.)

Young, Oran R. Systems of Political Science. Englewood Cliffs: Prentice-Hall, 1968.

Cita MLA (9th ed.)

Young, Oran R. Systems of Political Science. Prentice-Hall, 1968.