How do I get to New Jersey from La Guardia airport via subway/bus?

Take the m-60 bus to the nj Transit center in Manhattan, that'll take you near a mall in New Jersey.

Depends where you want to go in New Jersey. But basically, bus to Manhattan, maybe subway to get to either Port Authority if you're taking a bus to Jersey, or Penn Station/PATH train station if you're taking the train.

You can go city from city you can take subway for new Jersey