select data from many tables

Hi everyone :)

I have a selection screen :

TABLES: e070, e071, e07t, e070create, ctsproject, e070a.<br><br>SELECTION-SCREEN BEGIN OF BLOCK block1 WITH FRAME.<br>  PARAMETERS: p_ot TYPE e070-trkorr,<br>              p_nni TYPE e070-as4user,<br>              p_idpro TYPE ctsproject-externalid.<br>SELECTION-SCREEN END OF BLOCK block1.<br>

plz how i can relate tables to get the right result from the selection-screen with Select .. from ... or instruction " INNER JOIN ".
thanks