Lua APA (7ú heag.)

Zemke, R. (2001). E-service. McGraw-Hill.

Lua i Stíl Chicago (17ú heag.)

Zemke, Ron. E-service. McGraw-Hill, 2001.

Lua MLA (8ú heag.)

Zemke, Ron. E-service. McGraw-Hill, 2001.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.