APA (7th ed.) Citation

Ritchie, D. A. (1993). The young Oxford companion to the Congress of the United States. Oxford University Press.

Chicago Style (17th ed.) Citation

Ritchie, Donald A. The Young Oxford Companion to the Congress of the United States. New York: Oxford University Press, 1993.

MLA (9th ed.) Citation

Ritchie, Donald A. The Young Oxford Companion to the Congress of the United States. Oxford University Press, 1993.