Taylor, H. F., & Haas, W. (1986). German, a self-teaching guide. Wiley.
Lua i Stíl Chicago (17ú heag.)Taylor, Heimy F., agus Werner Haas. German, a Self-teaching Guide. New York: Wiley, 1986.
Lua MLA (9ú heag.)Taylor, Heimy F., agus Werner Haas. German, a Self-teaching Guide. Wiley, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.