MLA parenthetical citation?

how do i do MLA parenthetical citations for a website in my paper that i know the name of the author and title. the source i would like to cite is from a href="http://uidaho.edu/student_orgs/arthurian_legend/grail/fisher/texts/romance/chretien.htm" rel="nofollow"http://uidaho.edu/student_orgs/arthurian…/a and the title is conte del graal by Chretien de Troyes. PLEASE HELP!! THANKS SO MUCH :)