APA-viite (7. p.)

Kaufmann, A. (1975). Introduction to the theory of fuzzy subsets. Academic Pr.

Chicago-viite (17. p.)

Kaufmann, A. Introduction to the Theory of Fuzzy Subsets. Orlando, Fal: Academic Pr, 1975.

MLA-viite (9. p.)

Kaufmann, A. Introduction to the Theory of Fuzzy Subsets. Academic Pr, 1975.