APA (7th ed.) Citation

Walther, C. (1985). A classification of unification problems in many-sorted theories.

Chicago Style (17th ed.) Citation

Walther, Christoph. A Classification of Unification Problems in Many-sorted Theories. Karlsruhe, 1985.

MLA (9th ed.) Citation

Walther, Christoph. A Classification of Unification Problems in Many-sorted Theories. 1985.

Warning: These citations may not always be 100% accurate.