APA
Kappeler P., Hänninen P., International Business Machines Corporation & ebrary I. (2004). zSeries Trusted Key Entry (TKE) version 4.2 update. [S.l.]: IBM, International Technical Support Organization.
Chicago
Kappeler Patrick, Hänninen Pekka, International Business Machines Corporation and ebrary Inc. 2004. zSeries Trusted Key Entry (TKE) version 4.2 update. [S.l.]: IBM, International Technical Support Organization.
Harvard
Kappeler P., Hänninen P., International Business Machines Corporation and ebrary I. (2004). zSeries Trusted Key Entry (TKE) version 4.2 update. [S.l.]: IBM, International Technical Support Organization.
MLA
Kappeler Patrick, Hänninen Pekka, International Business Machines Corporation and ebrary Inc. zSeries Trusted Key Entry (TKE) version 4.2 update. [S.l.]: IBM, International Technical Support Organization. 2004.