Pence, R. W. (1929). College composition. The Macmillan company.
Lua i Stíl Chicago (17ú heag.)Pence, Raymond Woodbury. College Composition. New york: The Macmillan company, 1929.
Lua MLA (9ú heag.)Pence, Raymond Woodbury. College Composition. The Macmillan company, 1929.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.