Simmons Christopher. (1942). Letterhead & Logo Design 9. Oxford.
Lua i Stíl Chicago (17ú heag.)Simmons Christopher. Letterhead & Logo Design 9. USA: Oxford, 1942.
Lua MLA (9ú heag.)Simmons Christopher. Letterhead & Logo Design 9. Oxford, 1942.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.