Boulding, Kenneth E. (Kenneth Ewart), 1910-1993, author
Fefer and Simons , 1966
Buku Teks
Raymond F. Bellamy [and others]
McGraw-Hill, 1956
Buku Teks
Harsja W. Bachtiar, 1934-, author
[publisher not identified], [date of publication not identified]
Buku Teks
Weber, Max, 1864-1920, author
Transaction Publishers, 2011
Buku Teks
London:Mansell,London and New York,1981,
Buku Referensi