Sharma, Ram Sharan
Aspects of political ideas and institutions in ancient India
Motilal Banarsidass , 1991
 Buku Teks SO
Kaegi, Adolf
Life in ancient India : studies in rig vedic India / Adolf Kaegi
Susil Gupta , 1950
 Buku Teks SO
Kosambi
Culture and civilisation of ancient India in historical outline/D.D. Kosambi
Vikas Publishing House, 1975
 Buku Teks SO
Brown, Joe David
India
Time Incorporated, 1961
 Buku Teks SO
Hobbs, Lisa
India, India
McGraw-Hill, 1967
 Buku Teks SO