-Alberto Calderón. (2009). Coaching Sistémico. 18 de julio del 20202, de MORE Global Sitio web: http://www.coachsistemico.com/libroazul.pdf
-James Clear. (2013). 10 ways to be Happy with Yourself. 18 de julio del 2020, de Buffer Sitio web: https://buffer.com/resources/10-things-to-stop-doing-to-yourself-to-be-happier-backed-by-science/