Hormones from final target organs inhibit release of anterior pituitary hormones is an example of which hormonal release

There are three types of hormonal release control (increase or decrease production), which is stimulated by
1. specific molecules, minerals or particular nutrients ( chemical regulation)
2. other hormones (hormonal regulation)
3. input from nervous system. (neural regulation)

If the inhibition is caused by a different hormone, it would be considered hormonal regulation.  In the given example, the hormone is produced in the target organ.

However, if the inhibition is due to the accumulation of the hormone itself, then it is an example of a negative feedback.