Cita APA (7a ed.)

Barnes, R. M. (1961). Work sampling (2nd ed., 2nd printing.). John Wiley & Sons.

Cita Chicago Style (17a ed.)

Barnes, Ralph Mosser. Work Sampling. 2nd ed., 2nd printing. New York [etc.]: John Wiley & Sons, 1961.

Cita MLA (9a ed.)

Barnes, Ralph Mosser. Work Sampling. 2nd ed., 2nd printing. John Wiley & Sons, 1961.