Keitaro Hasegawa
Kodansha International, 1986
Buku Teks SO
Iwata, Ryushi
Asian Productivity Organizations, 1982
Buku Teks SO
Thomas Diefenbach
Ritsumeikan Asia Pacific University (APU), 2015
Artikel Jurnal
T. Daniel Coggin, Frank J. Fabozzi, editors
Frank J. Fabozzi Associates, 1997
Buku Referensi
Curtis, Gerald L.
Colimbia University Press, 1971
Buku Teks SO