how to seprate records from CSV file

Question

I want to seprate the field from csv file but thing is that field itself content commas so how to go for it
 for example
supid,  suppliername,         city,      state,              phone no
1,      Orton Eng,  mumbai, maharashtra,    02228695877,02228692356

here i have two phone nos with commas

thanks in advance