Παραπομπή APA

Smith, E., & Beaching. (1968). Measurement of the effectiveness of the productive unit. Institute of work study practitioners.

Παραπομπή Chicago Style

Smith, Ewart, και Beaching. Measurement of the Effectiveness of the Productive Unit. Enfield, Middlesex: Institute of work study practitioners, 1968.

Παραπομπή MLA

Smith, Ewart, και Beaching. Measurement of the Effectiveness of the Productive Unit. Institute of work study practitioners, 1968.