George Allen & Unwin Ltd. , 1945
Buku Teks
Niwata, Noriaki
Society of business and commerce, Keio University, 1971
Buku Teks
Ajith Abraham, editor
Springer-Verlag , 2012
eBooks
Farley, John E., author
Prentice-Hall, 1987
Buku Teks
Nji Raden Poespawati, author
Fakultas Teknik Universitas Indonesia, 1998
UI - Laporan Penelitian