APA (7th ed.) Citation

Ammon, U., & Hellinger, M. (1992). Status change of languages (Library edition.). W. de Gruyter.

Chicago Style (17th ed.) Citation

Ammon, Ulrich, and Marlis Hellinger. Status Change of Languages. Library edition. Berlin ; New York: W. de Gruyter, 1992.

MLA (9th ed.) Citation

Ammon, Ulrich, and Marlis Hellinger. Status Change of Languages. Library edition. W. de Gruyter, 1992.