Select Method to show data from 2 tables??

hi, I have 2 tables Model ModelId FirstName LastName Country Top20 ModelId PrimaryKey Top 20 table  has 20 rows each of which contain a ModelId of Type GUID that exists in Model Table. On the aspx page I want to show only the FirstName , LastName and Country of all the models that exist in the two tables , Model and Top20? thank you