The Encyclopedia of Sales: 25 Years of Experience + 700 Million Dollar in revenue – in a Sales Training Program by Sergio Bruna, Sales Guru September 6, 2022
Sergio Bruna, el Empresario, Autor y Conferencista Público, Comparte El Método Más Eficaz Para Dejar de Fumar June 2, 2021
The Behind the Scenes of the Number One Spanish Language Program to Quit Smoking, Founded by Sergio Bruna May 21, 2021