Sommerfeld, A. (1923). Atomic structure and spectral lines. Dutton.
Lua i Stíl Chicago (17ú heag.)Sommerfeld, Arnold. Atomic Structure and Spectral Lines. New York: Dutton, 1923.
Lua MLA (8ú heag.)Sommerfeld, Arnold. Atomic Structure and Spectral Lines. Dutton, 1923.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.