APA
"Karthikeyan M., .Manual for Tnpsc Examination General studies; Groups i and ii (preliminary & Main). Chennai: .
Chicago
"Karthikeyan M", .Manual for Tnpsc Examination General studies; Groups i and ii (preliminary & Main). Chennai: .
Harvard
"Karthikeyan M., .Manual for Tnpsc Examination General studies; Groups i and ii (preliminary & Main). Chennai: .
MLA
"Karthikeyan M", .Chennai: . .