Semper, I. J. (1939). The battle of the books. National Organization for Decent Literature.
Chicago-referens (17:e uppl.)Semper, Isidore Joseph. The Battle of the Books. Dubuque, Iowa: National Organization for Decent Literature, 1939.
MLA-referens (8:e uppl.)Semper, Isidore Joseph. The Battle of the Books. National Organization for Decent Literature, 1939.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.