APA (7th ed.) Zitazioa
Zimmerman, J. F. (2005). Congressional preemption: Regulatory federalism. State University of New York Press.
Chicago Style (17th ed.) Zitazioa
Zimmerman, Joseph Francis. Congressional Preemption: Regulatory Federalism. Albany: State University of New York Press, 2005.
MLA (9th ed.) Zitazioa
Zimmerman, Joseph Francis. Congressional Preemption: Regulatory Federalism. State University of New York Press, 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.