APA (7th ed.) Citation

Sredl, H. J., & Rothwell, W. J. (1987). The ASTD reference guide to professional training roles and competencies Vol.1 & 2. HRD Press.

Chicago Style (17th ed.) Citation

Sredl, 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 (9th ed.) Citation

Sredl, Henry J., and William J. Rothwell. The ASTD Reference Guide to Professional Training Roles and Competencies Vol.1 & 2. HRD Press, 1987.