6
by Meredith, William
Published 1785
Printed for J. Stockdale

8
by Roache, Rebecca, Savulescu, Julian
Published 2016
Oxford University Press

16
by Bentham, Jeremy
Published 1831
Published at the office of the Westminster Review by Robert Heward

20
by Pluquet, François-André-Adrien
Published 1786
Chez Barrois l'ainé and Barrois le jeaune