58-LA DANZA DEL CAMBIO- PETER SENGEBy Andres Lopez Astudillo / 12 septiembre 2008 http://books.google.com.co/books?id=aHkxpjym6-sC&pg=PA123&lpg=PA123&dq=PENSAMIENTO+SISTEMICO&source=web&ots=iAEeK2xKQO&sig=AZb_k-VU8zD3UgBvR8WbYq-LLMk&hl=es&sa=X&oi=book_result&resnum=9&ct=result#PPA9,M1