APA način citiranja (7. izdanje)
Barlen, T., & Blankertz, W. (2005). IBM HTTP server (powered by apache): An integrated solution for IBM eServer iSeries servers. IBM, International Technical Support Organization.
Čikaški stil citiranja (17. izdanje)
Barlen, Thomas, i Wilfried Blankertz. IBM HTTP Server (powered by Apache): An Integrated Solution for IBM EServer ISeries Servers. San Jose, CA: IBM, International Technical Support Organization, 2005.
MLA način citiranja (9. izdanje)
Barlen, Thomas, i Wilfried Blankertz. IBM HTTP Server (powered by Apache): An Integrated Solution for IBM EServer ISeries Servers. IBM, International Technical Support Organization, 2005.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.