The Encyclopedia of Sales: 25 Years of Experience + 700 Million Dollar in revenue – in a Sales Training Program by Sergio Bruna, Sales Guru admin 2022-09-06
Sergio Bruna, el Empresario, Autor y Conferencista Público, Comparte El Método Más Eficaz Para Dejar de Fumar admin 2021-06-02
The Behind the Scenes of the Number One Spanish Language Program to Quit Smoking, Founded by Sergio Bruna admin 2021-05-21