APA (7th ed.) Zitazioa
Siedler, C. W. (1935). Guide to Cicero (1a ed.). Oxford Book Company educational publishers.
Chicago Style (17th ed.) Zitazioa
Siedler, Charles W. Guide to Cicero. 1a ed. Oxford Book Company educational publishers, 1935.
MLA (9th ed.) Zitazioa
Siedler, Charles W. Guide to Cicero. 1a ed. Oxford Book Company educational publishers, 1935.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.