Manuel J. Smith was a psychologist and a pioneer in the life-changing assertiveness training movement. He was the author of the bestseller When I Say No, I Feel Guilty, which became a standard text used in assertiveness training in schools and the workplace.
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#1 NATIONAL BESTSELLER • Learn how to set boundaries without guilt using this revolutionary guide to saying “no” in everyday situations. Are you allowing your mother-in-law to impose her will on you? Are you embarrassed by praise or cr... SEE MORE