APA (7th ed.) Zitazioa
Felten, E. (1993). The ruling class: Inside the imperial congress. Heritage.
Chicago Style (17th ed.) Zitazioa
Felten, Eric. The Ruling Class: Inside the Imperial Congress. Massachusetts: Heritage, 1993.
MLA (9th ed.) Zitazioa
Felten, Eric. The Ruling Class: Inside the Imperial Congress. Heritage, 1993.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.