Langley, M. (1987). Rewarding the sales force. Institute of Personnel Management.
Citazione stile Chigago Style (17a edizione)Langley, Mike. Rewarding the Sales Force. London: Institute of Personnel Management, 1987.
Citatione MLA (9a ed.)Langley, Mike. Rewarding the Sales Force. Institute of Personnel Management, 1987.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.