Try this:
"SELECT tablea.fielda1, tablea.fielda2, tableb.fieldb1, tableb.fieldb2, tablec.fieldc1, tablec.fieldc2
FROM (tablea INNER JOIN tableb ON tablea.fielda1 = tableb.fieldb1) INNER JOIN tablec ON tablea.fielda1 = tablec.fieldc1;"
Good Luck MLK