Being sure of date of publication of a book I am practicing making citations of quotes and I am currently stuck on
publication dates.

To illustrate my issue, let’s use this this book:


The front pages state the copyright date as three separate years, which I have no idea how to interpret (see image below).
I checked on Google, and I found this on Amazon stating the publication date of Aug 10, 2010.
Checking the official site of publisher, I see "© 2011".


Do I need to make assumptions when taking the date, e.g., taking the first date from copyright without being certain that it is the correct publication date? I know I can contact the publisher and ask, but that seems like (a) a lot of work and (b) it’s pretty unlikely I’ll get a reply. I want to know if there are any tips on making sure that the publication date of the book is correct.
The three dates you see are the years the copyright was renewed. You probably just want the most recent of those dates, as that's the edition of the book you're working with.

Note that it can get more complex than that—edition and copyright date are not always the same—but its definitely good enough for citations.