What is the correct parenthetical citation for This quote?

"Although Susan B$.$ Anthony and Elizabeth Cady Stanton devoted $50$ years to the woman's suffrage movement, neither lived to see women gain the right to vote. But their work and that of many other suffragists contributed to the ultimate passage of the $19$th amendment in $1920."$

"Suffrage History." The Susan B$.$ Anthony Center for Women's Leadership, $2006,$