APA

Barendt Eric,, . (1998). An introduction to constitutional law. New York: Oxford University Press.

Chicago

Barendt Eric,, . 1998. An introduction to constitutional law. New York: Oxford University Press.

Harvard

Barendt Eric,, . (1998). An introduction to constitutional law. New York: Oxford University Press.

MLA

Barendt Eric,, . An introduction to constitutional law. New York: Oxford University Press. 1998.