Re:How to get meetings with people too busy to see you
by btilly on Monday August 12, 2013 @01:07PM
(#6200308)
Single quotes have another use. Which is to mark off quotations inside of quotations.
Technically speaking you use single quotes there, but not apostrophes. However I mention it because the quotation mark that you used is a single quote.
The "grocer's apostrophe" or "grocers' apostrophe" is what's incorrectly added to the plural form like what you're describing, the short answer is yes. '60s not 60's.