Francis,SRS. (1990). Premier IAS Main Manual. CBS Publisheres.
Chicago Style aipamenaFrancis,SRS. Premier IAS Main Manual. New delhi: CBS Publisheres, 1990.
MLA aipamenaFrancis,SRS. Premier IAS Main Manual. CBS Publisheres, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.