There are 2 titles associated with this person.

@book{ wphp_14770
  author={Newbery,Elizabeth and Boyer,Abel},
  year={1794},
  title={The complete French master, for ladies and gentlemen; containing, I. A new methodical French grammar. II. A well digested and copious Vocabulary. III. Familiar Phrases and Dialogues on all Manner of Subjects. IV. Dialogues of Wit and Humour. V. A Taste of the French Poetry. VI. A Collection of French Songs. Vii. A Collection of Choice Proverbs, both French and English. Viii. A catalogue of the most approved French books, recommended as proper in fitting up a Lady’s or a Gentleman’s Library. For The Use Of His Highness William, Sometime Duke Of Gloucester. By Mr. Abel Boyer, Author Of The Royal Dictionary, French And English.},
  publisher={T. Longman \& Charles Dilly \& Joseph Johnson \& James Nichols \& George, George, and John Robinson \& William Richardson \& Richard Baldwin \& Richard Goldsmith \& Samuel Hayes \& W. Stuart \& Elizabeth Newbery \& James Nunn \& James Evans},
  address={London},    }
@book{ wphp_14848
  author={Newbery,Elizabeth and Boyer,Abel},
  year={1797},
  title={The complete French master, for ladies and gentlemen; containing, I. A new methodical French grammar. II. A well digested and copious Vocabulary. III. Familiar Phrases and Dialogues on all Manner of Subjects. IV. Dialogues of Wit and Humour. V. A Taste of the French Poetry. VI. A Collection of French Songs. Vii. A Collection of Choice Proverbs, both French and English. Viii. A catalogue of the most approved French books, recommended as proper in fitting up a Lady's or a Gentleman's Library. For The Use Of His Highness William, Sometime Duke Of Gloucester. By Mr. Abel Boyer, Author Of The Royal Dictionary, French And English.},
  publisher={Charles Dilly \& Joseph Johnson \& George, George, and John Robinson \& W. Richardson \& Richard Baldwin \& George Wilkie [Paternoster Row] \& James Scatcherd \& J. Walker \& Thomas Norton Longman \& Elizabeth Newbery \& James Nunn \& Lee and Hurst},
  address={London},    }