General

Triad 
entry in Wikipedia

Tiandihui 天地會

Tiandihui (Wikipedia)

Gelaohui 哥老會

Cunningham, Alfred. A History of the Szechuan Riots. Shanghai: "Shanghai Mercury Office," 1895. [MS Reader format]
Riots that involved the Gelaohui.

Mason, Charles Welsh. The Chinese Confessions of Charles Welsh Mason. London: Grant Richards, 1924. [MS Reader format]  
Mason became involved with the Gelaohui in a plot to overthrow the Manchu government.


Hongmen 洪門


Qingbang / Hongbang  青幫  /  紅幫

Qingbang (Wikipedia)

White Lotus 白蓮教

The White Lotus Society  (Wikipedia)