PARR WILLIAM M. (1984). EXCUTIVE`S GUIDE TO EFFECTIVE LETTERS & REPORTS. TARAPOREVALA PUBLICATIONS.
Lua i Stíl Chicago (17ú heag.)PARR WILLIAM M. EXCUTIVE`S GUIDE TO EFFECTIVE LETTERS & REPORTS. BOMBAY: TARAPOREVALA PUBLICATIONS, 1984.
Lua MLA (9ú heag.)PARR WILLIAM M. EXCUTIVE`S GUIDE TO EFFECTIVE LETTERS & REPORTS. TARAPOREVALA PUBLICATIONS, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.