MLA

Kehrein, Wolfgang, and Richard Wiese. Phonology and Morphology of the Germanic Languages. Tübingen: Niemeyer, 1998.

APA

Kehrein, W., & Wiese, R. (1998). Phonology and morphology of the Germanic languages. Tübingen: Niemeyer.

Chicago

Kehrein, Wolfgang ed., and Richard Wiese ed. Phonology and Morphology of the Germanic Languages. Tübingen: Niemeyer, 1998.