Graupp, P., & Wrona, R. J. (2016). The TWI workbook: Essential skills of supervisors (Second edition.). CRC Press.
Chicago Style (17th ed.) CitationGraupp, Patrick, and Robert J. Wrona. The TWI Workbook: Essential Skills of Supervisors. Second edition. Boca Raton, FL: CRC Press, 2016.
MLA (8th ed.) CitationGraupp, Patrick, and Robert J. Wrona. The TWI Workbook: Essential Skills of Supervisors. Second edition. CRC Press, 2016.
Warning: These citations may not always be 100% accurate.