....
// master buku
    Route::get('master/buku','Buku_controller@index');
    Route::get('master/buku/add','Buku_controller@add');
    Route::post('master/buku/add','Buku_controller@store');
    Route::get('master/buku/{id}','Buku_controller@edit');
    Route::put('master/buku/{id}','Buku_controller@update');
    Route::delete('master/buku/{id}','Buku_controller@delete');
....