ARMISTEAD COLIN G. (1992). CUSTOMER SERVICE AND REPORT. PITMAN PUBLICATIONS.
Lua i Stíl Chicago (17ú heag.)ARMISTEAD COLIN G. CUSTOMER SERVICE AND REPORT. LONDON: PITMAN PUBLICATIONS, 1992.
Lua MLA (9ú heag.)ARMISTEAD COLIN G. CUSTOMER SERVICE AND REPORT. PITMAN PUBLICATIONS, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.