How to read associated entity

Hi,

I need to read associated entity in my application. I got to know below syntax from one of the thread but it doesn't work.  It returns customer entity data only but i need to read both customer and Address entity.

/sap/opu/odata/SAP/TOP/ContactPersons('XXXXXXX')?&?$expand=Address

Any help would be appreciated.

Thanks,

Swati