(1999). General studies manual for the UPSC civil services preliminary examination 1999. Tata McGraw-Hill.
Παραπομπή Chicago StyleGeneral Studies Manual for the UPSC Civil Services Preliminary Examination 1999. New Delhi: Tata McGraw-Hill, 1999.
Παραπομπή MLAGeneral Studies Manual for the UPSC Civil Services Preliminary Examination 1999. Tata McGraw-Hill, 1999.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.