Artículo Científico Bacon, L., y Krpan, D. (2018). (Not) Eating for the environment: The impact of restaurant menu design on vegetarian food choice. Appetite , 125 , 190-200. https://www.ncbi.nlm.nih.gov/pubmed/29428546 Libro Morgan, D., Krueger, R, y Scannell, A. (1998). Planning focus groups . Sage. https://books.google.com.gt/books?hl=en&lr=&id=vx85DQAAQBAJ&oi=fnd&pg=PP1&ots=EdrUCt7Qow&sig=TSGFruEn2XMZfoauxARDNr7giws&redir_esc=y#v=onepage&q&f=false Tesis Montoya, A. (2015). Patterns of Post-Mental Illness (Not Published) (Maestría). Ottawa University. Video Khan Academy. (s.f.). Tensión Superficial. Recuperado de Khan Academy Español: https://es.khanacademy.org/science/biology/water-acids-and-bases/cohesion-and-adhesion/v/surface-tension