Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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