Cita APA (7th ed.)

Smith, T. J. (2015). Variability in human performance. CRC Press.

Cita Chicago (17th ed.)

Smith, Thomas Jay. Variability in Human Performance. Boca Raton: CRC Press, 2015.

Cita MLA (9th ed.)

Smith, Thomas Jay. Variability in Human Performance. CRC Press, 2015.