Müller, E. (2012). Standard vowel systems of English, German, and Dutch: Variation in norm. Peter Lang.
Cita Chicago (17th ed.)Müller, Ernst-August. Standard Vowel Systems of English, German, and Dutch: Variation in Norm. Frankfurt am Main: Peter Lang, 2012.
Cita MLA (9th ed.)Müller, Ernst-August. Standard Vowel Systems of English, German, and Dutch: Variation in Norm. Peter Lang, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.