Sredl, H. J., & Rothwell, W. J. (1987). The ASTD reference guide to professional training roles and competencies Vol.1 & 2. Amberst,Massachusetts: HRD Press.
Chicago Style CitationSredl, Henry J., and William J. Rothwell. The ASTD Reference Guide to Professional Training Roles and Competencies Vol.1 & 2. Amberst,Massachusetts: HRD Press, 1987.
MLA CitationSredl, Henry J., and William J. Rothwell. The ASTD Reference Guide to Professional Training Roles and Competencies Vol.1 & 2. Amberst,Massachusetts: HRD Press, 1987.
Warning: These citations may not always be 100% accurate.