(Fernández, 2012)

(Manahan, 2007)

https://books.google.com.pr/books?id=5NR8DIk1n68C&pg=PA167&lpg=PA167&dq=efectos+de+las+sales+de+calcio+y+magnesio+en+el+jabon&source=bl&ots=k5hiM-ugIh&sig=2Ls3ZV2cXxYuTU5YKU0Qte6Rdf0&hl=es-419&sa=X&ved=0CBwQ6AEwAGoVChMIkr_u6bnhyAIVBR4eCh0RnQgR#v=onepage&q=efectos%20de%20las%20sales%20de%20calcio%20y%20magnesio%20en%20el%20jabon&f=false

(Church, 2004)

https://books.google.com.pr/books?id=-rrKZNH8aQsC&pg=PA114&dq=jabon+aceite+y+agua&hl=es-419&sa=X&ved=0CCcQ6AEwAmoVChMItqKmuL7hyAIVQtgeCh1G0Q-8#v=onepage&q=jabon%20aceite%20y%20agua&f=false

https://books.google.com.pr/books?id=ZM-qMxtLABUC&pg=PA508&lpg=PA508&dq=agua+acida+y+el+jabon&source=bl&ots=18lopehSra&sig=_POj1eHuje-vTMRYUJRlfrRHBnI&hl=es-419&sa=X&ved=0CCQQ6AEwAWoVChMIiOW598ThyAIVBlweCh08BA4X#v=onepage&q=agua%20acida%20y%20el%20jabon&f=false

http://www.ehowenespanol.com/jabon-espuma-como_134035/

http://www.ehowenespanol.com/jabon-espuma-como_134035/

http://es.slideshare.net/erickrenato/estudio-tecnico-sobre-la-elaboracion-del-jabon

http://jabonesydetergentes.tripod.com/Impacto_Ambiental.html