Cita APA (7th ed.)

Riley, V. (1956). Bibliography on work sampling and ratio delay. Operations Research Office.

Cita Chicago (17th ed.)

Riley, Vera. Bibliography on Work Sampling and Ratio Delay. [Baltimore]: Operations Research Office, 1956.

Cita MLA (9th ed.)

Riley, Vera. Bibliography on Work Sampling and Ratio Delay. Operations Research Office, 1956.