APA
Thorpe E., . (1999). General Studies for Civil Services Preliminary Examination Papers-1- 2018. Bengaluru: Brilliant Printers.
Chicago
Thorpe Edgar, . 1999. General Studies for Civil Services Preliminary Examination Papers-1- 2018. Bengaluru: Brilliant Printers.
Harvard
Thorpe E., . (1999). General Studies for Civil Services Preliminary Examination Papers-1- 2018. Bengaluru: Brilliant Printers.
MLA
Thorpe Edgar, . General Studies for Civil Services Preliminary Examination Papers-1- 2018. Bengaluru: Brilliant Printers. 1999.