Consultant's Manual A Complete Guide to Building a Successful Consulting Practice Greenbaum Thomas L. Heftet / 1994 / Engelsk
Moderating Focus Groups A Practical Guide for Group Facilitation Greenbaum Thomas L. Heftet / 2000 / Engelsk
Moderating Focus Groups A Practical Guide for Group Facilitation Greenbaum Thomas L. Innbundet / 2000 / Engelsk