Borglum, G. P., & Borglum, L. V. (1935). Cours pratique avance; conversation-composition. Harper.
Lua i Stíl Chicago (17ú heag.)Borglum, George Paul, agus Lucy Vignal Borglum. Cours Pratique Avance; Conversation-composition. New York: Harper, 1935.
Lua MLA (9ú heag.)Borglum, George Paul, agus Lucy Vignal Borglum. Cours Pratique Avance; Conversation-composition. Harper, 1935.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.