Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Sociology Basic Sociology Terms and Concepts
Classification of groups into in-group and out-group was presented by whom among the following?
1
Tonnies
2
Sumner
3
Homans
4
More than one of the above
5
None of the above