Werner, Otmar. 1972. Phonemik des Deutschen. (Sammlung Metzler, 108.) Stuttgart: J.B. Metzler Verlagsbuchhandlung.
@book{werner1972, address = {Stuttgart}, author = {Werner, Otmar}, publisher = {J.B. Metzler Verlagsbuchhandlung}, series = {Sammlung Metzler}, title = {Phonemik des Deutschen}, volume = {108}, year = {1972} }