APA (7th ed.) Citation

Zimmermann, H. (1991). Fuzzy set theory and its applications (2., rev. ed. ; 2. print.). Kluwer.

Chicago Style (17th ed.) Citation

Zimmermann, Hans-Jürgen. Fuzzy Set Theory and Its Applications. 2., rev. ed. ; 2. print. Boston u.a: Kluwer, 1991.

MLA (9th ed.) Citation

Zimmermann, Hans-Jürgen. Fuzzy Set Theory and Its Applications. 2., rev. ed. ; 2. print. Kluwer, 1991.