Cita APA (7a ed.)

Z�et�enyi, T. (1988). Fuzzy sets in psychology. North-Holland ; Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co..

Cita Chicago Style (17a ed.)

Z�et�enyi, Tam�as. Fuzzy Sets in Psychology. Amsterdam ; New York : New York, N.Y., U.S.A.: North-Holland ; Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co., 1988.

Cita MLA (8a ed.)

Z�et�enyi, Tam�as. Fuzzy Sets in Psychology. North-Holland ; Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co., 1988.