Trenton, NJ to Long Island University-Brooklyn buses and trains from $10

Here are some trips other travelers have found on Routefriend.
$10
3h 57m
1 stop
NJTransit GotoBus
$11
4h 12m
1 stop
NJTransit GotoBus
$41
6h 9m
2 stops
NJTransit GotoBus