Citazione Stile APA (7a Edizione)

Borglum, G. P., & Borglum, L. V. (1935). Cours pratique avance; conversation-composition. Harper.

Citazione stile Chigago Style (17a edizione)

Borglum, George Paul, e Lucy Vignal Borglum. Cours Pratique Avance; Conversation-composition. New York: Harper, 1935.

Citatione MLA (9a ed.)

Borglum, George Paul, e Lucy Vignal Borglum. Cours Pratique Avance; Conversation-composition. Harper, 1935.