LostAllHope Wiki: http://lostallhope.com/suicide-methods
Suicide Faq: https://archive.fo/YErG8
A Practical Guide to Suicide: https://archive.fo/jceEo
Suffocation Guide: https://web.archive.org/web/20160224111455/https://en.wikibooks.org/wiki/Suicide/Suffocation
ASM Suicide Reference: https://archive.fo/DP8eg
Collection of suicide books: http://euthanasiaandsuicide.blogspot.com/
ASH textfile: https://archive.fo/R3gTg
List of Successful Suicides and Their Methods: https://en.wikipedia.org/wiki/List_of_suicides_in_the_21st_century