Harrison, H. (1988). Secretariel duties (8th.). Pitman.
Lua i Stíl Chicago (17ú heag.)Harrison, Helen. Secretariel Duties. 8th. London: Pitman, 1988.
Lua MLA (9ú heag.)Harrison, Helen. Secretariel Duties. 8th. Pitman, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.