Littlejohn, A. (1988). Company to company: A new approach to busines correspondence in english. Cambridge University.
Lua i Stíl Chicago (17ú heag.)Littlejohn, Andrew. Company to Company: A New Approach to Busines Correspondence in English. Cambridge: Cambridge University, 1988.
Lua MLA (9ú heag.)Littlejohn, Andrew. Company to Company: A New Approach to Busines Correspondence in English. Cambridge University, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.