APA (7e ed.) Bronvermelding

Friedrich, C. J. (1968). Trends of federalism in theory and practice. Praeger.

Chicago (17e ed.) Bronvermelding

Friedrich, Carl Joachim. Trends of Federalism in Theory and Practice. New York: Praeger, 1968.

MLA (9e ed.) Bronvermelding

Friedrich, Carl Joachim. Trends of Federalism in Theory and Practice. Praeger, 1968.