begin{filecontents*}{test.bib}
    title     = {{Seinte Katerine}},
    editor  = {S.R.T.O. d'Ardenne and E.J. Dobson},
    year      = {1981},
    publisher = {Oxford University Press},
    address   = {Oxford}
end{filecontents*}

documentclass{minimal}
usepackage[style=mla,backend=bibtex8]{biblatex}
bibliography{test}

begin{document}
    According to citeauthor{katherine} (citeyear{katherine})...
end{document}