Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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