Friedrich, C. J. (1957). Constitutional reason of state: The survival of the constitutional order. Brown University Press.
Cita Chicago (17th ed.)Friedrich, Carl Joachim. Constitutional Reason of State: The Survival of the Constitutional Order. Providence: Brown University Press, 1957.
Cita MLA (9th ed.)Friedrich, Carl Joachim. Constitutional Reason of State: The Survival of the Constitutional Order. Brown University Press, 1957.
Atenció: Aquestes cites poden no estar 100% correctes.