APA

Siegel S., . (1956). Nonparametric statistics. New York, New York, United States: McGraw-Hill Book Company.

Chicago

Siegel Sidney, . 1956. Nonparametric statistics. New York, New York, United States: McGraw-Hill Book Company.

Harvard

Siegel S., . (1956). Nonparametric statistics. New York, New York, United States: McGraw-Hill Book Company.

MLA

Siegel Sidney, . Nonparametric statistics. New York, New York, United States: McGraw-Hill Book Company. 1956.