Werner-Spanhoofd, A. Lehrbuch der deutschen sprache: A practical course in German for high school academy of college / by Arnold Werner-Spanhoofd.
Lua i Stíl Chicago (17ú heag.)Werner-Spanhoofd, Arnold. Lehrbuch Der Deutschen Sprache: A Practical Course in German for High School Academy of College / by Arnold Werner-Spanhoofd. London : D. C. Heath & Co., 1921.
Lua MLA (8ú heag.)Werner-Spanhoofd, Arnold. Lehrbuch Der Deutschen Sprache: A Practical Course in German for High School Academy of College / by Arnold Werner-Spanhoofd.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.