Smith, R. W. (2005). LPIC-1: Linux Professional Institute Certification. Study guide (First edition.). Editorial Wiley Publishing.
Chicago-viite (17. p.)Smith, Roderick W. LPIC-1: Linux Professional Institute Certification. Study Guide. First edition. Indianápolis: Editorial Wiley Publishing, 2005.
MLA-viite (8. p.)Smith, Roderick W. LPIC-1: Linux Professional Institute Certification. Study Guide. First edition. Editorial Wiley Publishing, 2005.
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