Jaques, E. (1964). Time-span handbook: The use of time-span of discretion to measure the level of work in employment roles and to arrange an equitable payment structure. Heinemann.

Jaques, Elliott. Time-span Handbook: The Use of Time-span of Discretion to Measure the Level of Work in Employment Roles and to Arrange an Equitable Payment Structure. London: Heinemann, 1964.

Jaques, Elliott. Time-span Handbook: The Use of Time-span of Discretion to Measure the Level of Work in Employment Roles and to Arrange an Equitable Payment Structure. Heinemann, 1964.