Aubrey, Henry G., author
National Planning Association, 1961
Buku Teks
Hodgetts, Richard M., author
Saunders, 1977
Buku Teks
Mahathir bin Mohamad, 1925-, author
Pelanduk Publications, 1986
Buku Teks
Wisnu Murdiono, author
Fakultas Ilmu Komputer Universitas Indonesia, 2004
UI - Skripsi (Membership)
Myrdal, Gunnar, 1898-, author
Pantheon Books, 1963
Buku Teks