Müller, E. (2012). Standard vowel systems of English, German, and Dutch: Variation in norm. Peter Lang.
Lua i Stíl Chicago (17ú heag.)Müller, Ernst-August. Standard Vowel Systems of English, German, and Dutch: Variation in Norm. Frankfurt am Main: Peter Lang, 2012.
Lua MLA (9ú heag.)Müller, Ernst-August. Standard Vowel Systems of English, German, and Dutch: Variation in Norm. Peter Lang, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.