Informaciòn: Greenpeace México. (2018, 12 noviembre). 40 tips para cuidar el planeta. Recuperado 31 marzo, 2019, de https://www.greenpeace.org/mexico/blog/1405/40-tips-para-cuidar-el-planeta/
Audio: Guided Entry-lietoofine. Recuperado de:http://freemusicarchive.org/search/?adv=1&quicksearch=&search-genre=Genres&only-instrumental=1&duration_from=03%3A00&duration_to=03%3A30&music-filter-CC=on&music-filter-CC-attribution-only=on&music-filter-CC-attribution-sharealike=1&music-filter-CC-attribution-noderivatives=1&music-filter-CC-attribution-noncommercial=1&music-filter-CC-attribution-noncommercial-sharealike=1&music-filter-CC-attribution-noncommercial-noderivatives=1&sort=track_date_published&d=1&page=6

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