The Monsters Know What They're Doing     Dungeons And Dragons original/official source
Angry Golem (web)     D&D 5e original/official source
Pathfinder 2e Bestiary 1     Pathfinder (no source link)
Mythic Monster Manual v1     Pathfinder original/official source
All Sorts Of Critters (web)     Pathfinder original/official source
Emirikol's Guide To Devils     D&D 5e original/official source
The Atlantean Bestiary     Any original/official source