Preposition after bisogno

In Grammar lesson 2.7 we have “Loro hanno bisogno”  which means “They need”, or literally “They have need”.

In French there is a similar construction “Ils ont besoin de…”, so I wonder if there needs to be a preposition (di  perhaps) in Italian when used in a phrase?

If so perhaps an example of its use could clarify.

• Io ho bisogno di mangiare = I need to eat
• Loro avevano bisogno di una casa = They needed a home
• Lui avrà bisogno di studiare = He will need to study

Ciao Caterina, grazie!

I was pretty sure, but it's good to have it confirmed.