APA (7th ed.) Citation

Kaufmann, A. Introduction to the theory of fuzzy subsets. Acad. Press.

Chicago Style (17th ed.) Citation

Kaufmann, Arnold. Introduction to the Theory of Fuzzy Subsets. New York [u.a.]: Acad. Press.

MLA (9th ed.) Citation

Kaufmann, Arnold. Introduction to the Theory of Fuzzy Subsets. Acad. Press.

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