There are 3 titles associated with this person.

@book{ wphp_15659
  author={Astell,Mary and Norris,John},
  year={1695},
  title={Letters concerning the love of God, between the author of the Proposal to the Ladies and Mr. John Norris: Wherein his late discourse, shewing, that it ought to be intire and exclusive of all other loves, is further cleared and justified. Published by J. Norris, M.A. Rector of Bemerton near Sarum.},
  publisher={Samuel Manship \& Richard Wilkin},
  address={London},    }
@book{ wphp_15658
  author={Astell,Mary and Norris,John},
  year={1705},
  title={Letters concerning the love of God, between the author of the Proposal to the Ladies and Mr. John Norris: Wherein his late discourse, shewing, that it ought to be intire and exclusive of all other loves, is further cleared and justified. Published by J. Norris, M.A. Rector of Bemerton near Sarum. The second edition, corrected by the authors, with some few things added.},
  publisher={Samuel Manship \& Richard Wilkin},
  address={London},    }
@book{ wphp_15660
  author={Astell,Mary and Norris,John},
  year={1730},
  title={Letters concerning the love of God, between the author of the Proposal to the Ladies and Mr. John Norris: Wherein his late discourse, shewing, that it ought to be intire and exclusive of all other loves, is further cleared and justified. Published by J. Norris, M.A. Rector of Bemerton near Sarum. The third edition, corrected by the authors, with some few things added.},
  publisher={Edmund Parker},
  address={London},    }