Krull, E., Fetting, H., & Saeger, W. (1964). Herbert Ihering (o.A.). Henschelverlag.
Lua i Stíl Chicago (17ú heag.)Krull, Edith, Hugo Fetting, agus Willy Saeger. Herbert Ihering. o.A. Berlin: Henschelverlag, 1964.
Lua MLA (8ú heag.)Krull, Edith, et al. Herbert Ihering. o.A. Henschelverlag, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.