Παραπομπή APA

Wetherill, G. B. (1967). Elementary statistical methods. Methuen & Co.

Παραπομπή Chicago Style

Wetherill, G. Barrie. Elementary Statistical Methods. London: Methuen & Co, 1967.

Παραπομπή MLA

Wetherill, G. Barrie. Elementary Statistical Methods. Methuen & Co, 1967.