APA (7th ed.) Citation

Wartburg, W. v., & Ullmann, S. (1969). Problems and methods in linguistics (Rev. ed.). Barnes and Noble.

Chicago Style (17th ed.) Citation

Wartburg, Walther von, and Stephen Ullmann. Problems and Methods in Linguistics. Rev. ed. New York: Barnes and Noble, 1969.

MLA (9th ed.) Citation

Wartburg, Walther von, and Stephen Ullmann. Problems and Methods in Linguistics. Rev. ed. Barnes and Noble, 1969.