Riker, W. H. (1964). Federalism: Origin, operation, significance. Little, Brown.
Tohutoru Kātū Chicago (17th ed.)Riker, William H. Federalism: Origin, Operation, Significance. Boston: Little, Brown, 1964.
Tohutoro MLA (9th ed.)Riker, William H. Federalism: Origin, Operation, Significance. Little, Brown, 1964.
Kia tūpato: Kāore pea ēnei kupu hautoa i te ōrite pū 100%.