Ferris, B. (1961). Mark scaling tables. Pitman.
Lua i Stíl Chicago (17ú heag.)Ferris, Brian. Mark Scaling Tables. Lond.: Pitman, 1961.
Lua MLA (8ú heag.)Ferris, Brian. Mark Scaling Tables. Pitman, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.