You're referring to the book "El Poder de un No Positivo" (The Power of a Positive No) by William Ury!
She looked down at her tablet, where the PDF on negotiation theory still sat in her library. She smiled. The power wasn't just in the word "No." The power was in the "Yes" that followed it. El Poder De Un No Positivo William Ury PDF
The next morning, Elena didn't just refuse the project; she used the Yes-No-Yes sandwich : You're referring to the book "El Poder de
Conclusión
State your refusal clearly and firmly based on the "Yes" above. It is not a personal attack; it is a limit. "Therefore, I cannot work this Saturday". YES? (The Proposal): Resumen de los principios clave