Roland T. Rust. Service Quality: New Directions in Theory and Practice. SAGE.
Lua i Stíl Chicago (17ú heag.)Roland T. Rust. Service Quality: New Directions in Theory and Practice. SAGE.
Lua MLA (8ú heag.)Roland T. Rust. Service Quality: New Directions in Theory and Practice. SAGE.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.