Παραπομπή APA

Hettmansperger,T.P, & McKean, J. (1998). Robust nonparametric statistical methods. Arnold.

Παραπομπή Chicago Style

Hettmansperger,T.P, και J.W McKean. Robust Nonparametric Statistical Methods. London: Arnold, 1998.

Παραπομπή MLA

Hettmansperger,T.P, και J.W McKean. Robust Nonparametric Statistical Methods. Arnold, 1998.