I need help finding direction on how to research family in Piedimonte d'Alife

I'm looking for some family history. I've found that my Great Grandfather came to the USA with his parents and brother and sister. I believe they came from Piedimonte d'Alife Italy in 1906. They settled in Rochester New York USA.

Father: Raffaele Civitello (birthday in Mar 3, 1876)
Mother: Raffaela ...