APA (7th ed.) Citation

Riker, W. H. (1964). Federalism: Origin, operation, significance. Little, Brown.

Chicago Style (17th ed.) Citation

Riker, William H. Federalism: Origin, Operation, Significance. Boston: Little, Brown, 1964.

MLA (9th ed.) Citation

Riker, William H. Federalism: Origin, Operation, Significance. Little, Brown, 1964.