Francis, S. (1987). Premeir IAS General Studies (8th ed ed.). CBS College.
Chicago Edition CitationFrancis, SRS. Premeir IAS General Studies. 8th ed ed. New Delhi: CBS College, 1987.
Cita MLAFrancis, SRS. Premeir IAS General Studies. 8th ed ed. CBS College, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.