I pull from 2 sources when I teach grammar and they have conflicting information. I have googled and am told both ways are correct I would like to straighten this out. If you had the sentence 'Mrs. Jones car is red' is it: Mrs. Jones's car is red. OR Mrs. Jones' car is red. Personally, I use the first way. There is only one Mrs. Jones. If it said The Jones' car is red. it would be different because there is more than one Jones. Please help. I think I am going to accept both ways on their assignment, but it bothers me.