Vinod Thomas [and others]
Gramedia Pustaka Utama, 2001
Buku Teks
Emilla Melati
2016
UI - Tesis Membership
Weil, David N.
Pearsons Addison-Wesley, 2009
Buku Teks
Eltis, W.A.
Hutchinson University Library , 1966
Buku Teks
Rostow, Walt Whitman
W.W. Norton, 1962
Buku Teks