Cita APA (7a ed.)

Watkins, J. G. (1942). Objective measurement of instrumental perfomance. Columbia University.

Cita Chicago Style (17a ed.)

Watkins, John Goodrich. Objective Measurement of Instrumental Perfomance. New York: Columbia University, 1942.

Cita MLA (8a ed.)

Watkins, John Goodrich. Objective Measurement of Instrumental Perfomance. Columbia University, 1942.