Fennell, Barbara A.
A History of English : a sociolinguistic approach
Blackwell Publishers, 2001
 Buku Teks SO
The Cultural economy
Helmut Anheier, Yudhishthir Raj Isar, editor
SAGE Publications, 2008
 Buku Teks SO
Rogers, Everett M.
Communication of innovations: a cross-cultural approach
The Free Press, 1971
 Buku Teks SO
Raychoudhary, S.C.
Social cultural and economic history of India (medieval age)
Surjeet Publications, 1984
 Buku Teks SO
Berkhofer, Jr, Robert F
Behavioral approach to historical analysis
Collier MacMillan Limited , 1969
 Buku Teks SO