When do you use an extra apostrophe “s” following a last name ending with the letter “s”?
Saturday, October 29th, 2011When do you use an extra apostrophe “s” following a last name ending with the letter “s”?
Chicago Manual of Style, 14th Edition, 6.24-30 says:
The general rule for the possessive of nouns covers most proper nouns, including most names ending in sibilants (but see exceptions in 6.26-27 and alternatives in 6.30). Kansas’s; Burns’s poems; Marx’s theories; [...]