FETTER ROBERT B. (1975). QUALITY CONTROL SYSTEM. TARAPOREVALA PUBLICATIONS.
Lua i Stíl Chicago (17ú heag.)FETTER ROBERT B. QUALITY CONTROL SYSTEM. BOMBAY: TARAPOREVALA PUBLICATIONS, 1975.
Lua MLA (9ú heag.)FETTER ROBERT B. QUALITY CONTROL SYSTEM. TARAPOREVALA PUBLICATIONS, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.