It reads as grammatically correct to me. As for the citation, I'll quote what I already wrote in a comment elsewhere:

These are all from the book Ethics: Discovering Right and Wrong (Eighth Edition). It was written by Louis P. Pojman and James Fieser. Cengage is the company selling the textbook.

That final excerpt is from page 89 under the subheader "The Argument from Counterintuitive Consequences."

Anna's Archive has the pdf if you're interested in taking a look, but I don't think I can link to that directly.