Mosca, Gaetano, author
McGraw-Hill Book, 1939
Buku Teks
Khan, Rais A.
Irwin Dorsey, 1977
Buku Teks
Paige, Glenn D.
University of Hawai, 1993
Buku Teks
Paramitha Wardhani, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2014
UI - Skripsi (Membership)
The University of Michigan Press, 1999
Buku Teks