Jones, Lonzo
University, 1928
Buku Teks
Harper & Brothers , 1954
Buku Teks
Tirani, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2013
UI - Tesis Membership
Jones, G. Brian
Human Science Press, 1977
Buku Teks
Univ. of Minnesota Press, 1949
Buku Teks