I have uncollected recipes and some can be obtained from world creatures.
Does that mean that recipes can drop from any mob from that expansion including raids/dungeons? 
Thank You.
I think it might be from any creatures in the open world (aka not instanced content).
I know some items are listed as âworld dropâ but in reality they actually drop from a handful of specific mobs in a specific area so I think itâs better to just look on wowhead right away than waste time trying to get a GM to tell you to go look on wowhead xD
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Yes, I would like to know exactly what they define as âworld creaturesâ. I have unlearned patterns I would like to obtain and the information I get is âdrops from world creaturesâ. What exactly does that mean?
So - while THAT specifically may take a while to implement, and it might be something just to keep you searching - WoWheadâs got a pretty user-friendly page for every recipe and whatâs dropped it the most. 
Might narrow down your searches a little bit.
One day weâll get that on retail! One day!!
I know this is an older post but I was looking for this answer recently and have information that could help. I just ran Blackrock Spire (Raid) and from the final boss dropped a crafting pattern for my blacksmithing, Whitesoul Helm. This is listed in the profession log as a âWorld Creatureâ drop, but obviously dropped while in an instance. So I would assume this means âWorld Creatureâ means anything from that expansion can drop it.