Finding all References to a Primary Key

I'm sorry if this is has been discussed, but I tried to find the answer 
in the archives and failed, so...

How do I find all the rows in other tables that reference a specific row 
in another table?  I'm only trying to find rows that are in tables where 
there is a Foreign Key referencing the primary key of the table in question.

Example:
Table People has a primary key of people_id
There are say 20 tables that have foreign keys referencing people.people_id
How do I find all the rows in all of those 20 tables that reference a 
particular person in the people table?


Thank you in advance,

Matthew O'Connor