Question

Which option presents citation information in the most credible way?

Answer 1

I would say According to the book Counting the Beans, the data are unsound. Because you give the name of the book and the page where such information can be found.

Answer 2

The citation information in the most credible way is:

According to an unknown author, the data are "flawed significantly" (90).

Because this statement presents the quotation marks which means that was excerpted from another author and the page where this citation was taken.