Block, P. (2000). Peter block flawless consulting: A guide to getting your expertise used. San Francisco: Jossey-Bass/Pfeiffer.
Dyfyniad Arddull ChicagoBlock, Peter. Peter Block Flawless Consulting: A Guide to Getting Your Expertise Used. San Francisco: Jossey-Bass/Pfeiffer, 2000.
Dyfyniad MLABlock, Peter. Peter Block Flawless Consulting: A Guide to Getting Your Expertise Used. San Francisco: Jossey-Bass/Pfeiffer, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.