Betz, F., & Holzwarth, C. H. (1933). A second German book. American book company.
Lua i Stíl Chicago (17ú heag.)Betz, Frederick, agus Charles Homer Holzwarth. A Second German Book. New York: American book company, 1933.
Lua MLA (9ú heag.)Betz, Frederick, agus Charles Homer Holzwarth. A Second German Book. American book company, 1933.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.