iTextSharp.text.Image footerImage = new Quote().GetFooter();
Rectangle page = document.PageSize();
PdfPTable foot = new PdfPTable(1);
foot.DefaultCell.BorderWidth = 0;
foot.DefaultCell.BorderColorBottom = new Color(255, 255, 255);
foot.AddCell(footerImage);
foot.TotalWidth = page.Width - document.LeftMargin - document.RightMargin;
foot.WriteSelectedRows(0, -1, document.LeftMargin, foot.TotalHeight - 7, writer.DirectContent);