Pathfinder 1e Bestiary 3     Pathfinder original/official source
Pathfinder 2e Bestiary 1     Pathfinder original/official source
Tome Of Horrors Complete     Pathfinder original/official source
All Sorts Of Critters (web)     Pathfinder original/official source
Exotic Encounters     Pathfinder original/official source
Latin American Monsters     D&D 5e original/official source
AD&D Fiend Folio     AD&D 1e (no source link)