bradifield, r. M., keillor,jean-pierre, r., & pranell, m. O. (1977). The International year book and statesmen's who's who. IPC business press limited.
Chicago Style (17th ed.) Zitazioabradifield, robert M., researcher keillor,jean-pierre, eta mervyn O. pranell. The International Year Book and Statesmen's Who's Who. britain: IPC business press limited, 1977.
MLA (9th ed.) Zitazioabradifield, robert M., et al. The International Year Book and Statesmen's Who's Who. IPC business press limited, 1977.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.