Nauheim, F. (1979). Salesman`s complete model letter handbook. Taraporevala.
Lua i Stíl Chicago (17ú heag.)Nauheim, Ferd. Salesman`s Complete Model Letter Handbook. Bombay: Taraporevala, 1979.
Lua MLA (9ú heag.)Nauheim, Ferd. Salesman`s Complete Model Letter Handbook. Taraporevala, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.