Cita APA (7a ed.)

Mac Crabbs, L. (1925). Measuring efficiency. Columbia University.

Cita Chicago Style (17a ed.)

Mac Crabbs, Lelah. Measuring Efficiency. New York: Columbia University, 1925.

Cita MLA (9a ed.)

Mac Crabbs, Lelah. Measuring Efficiency. Columbia University, 1925.