Kondo, Yoshio (1994). «Kaoru Ishikawa: What He thought and Achieved, A Basis for Further Research». Quality Management Journal. 1 (4): 86–91. ISSN1068-6967. doi:10.1080/10686967.1994.11918666
worldcat.org
Kondo, Yoshio (1994). «Kaoru Ishikawa: What He thought and Achieved, A Basis for Further Research». Quality Management Journal. 1 (4): 86–91. ISSN1068-6967. doi:10.1080/10686967.1994.11918666
Watson, Greg (2004). «The Legacy Of Ishikawa». Quality Progress. 37 (4): 54–57. ISSN0033-524X