global $wgOut, $wgRequest;
$this->setHeaders();
$this->isbn = $this->cleanIsbn( $isbn ? $isbn : $wgRequest->getText( 'isbn' ) );
$wgOut->addWikiText( wfMsgNoTrans( 'booksources-summary' ) );
$wgOut->addHtml( $this->makeForm() );
global $wgOut, $wgRequest;
$this->setHeaders();
$this->isbn = $this->cleanIsbn( $isbn ? $isbn : $wgRequest->getText( 'isbn' ) );
$wgOut->addWikiText( wfMsgNoTrans( 'booksources-summary' ) );
$wgOut->addHtml( $this->makeForm() );