World Executive's Digest, 1981
Buku Teks
Iwata, Ryushi
Asian Productivity Organizations, 1982
Buku Teks
Thomas Diefenbach
Ritsumeikan Asia Pacific University (APU), 2015
Artikel Jurnal
edited by Paul U. Ali, Greg N. Gregoriou
CRC Press, Taylor & Francis Group, 2008
Buku Teks
T. Daniel Coggin, Frank J. Fabozzi, editors
Frank J. Fabozzi Associates, 1997
Buku Referensi