The ASTD Reference Guide to Workplace Learning and Performance: Volume 1: Present and Future Roles and Competencies - Paperbackby Henry J. Sredl (Author), William J. Rothwell (Author) The ASTD Reference Guide Volume 1 is intended to provide a context for the Workplace Learning and Performance (WLP) field, to expand on the roles and competencies described in ASTD Models for Workplace Learning and Performance, and to provide readers with the resources for enacting those roles and demonstrating those competencies. Number of Pages: 474 Dimensions: 0. 95 x 9. 25 x 7. 52 IN