"That's one for the medical journal, George," he said. "Doing a Caesarian with a jack-knife and sewing it up with nine-foot, tapered gut leaders."

I would like to include this quote in my paper, but am not sure how to do it, since it already contains quotation marks.

For a quote inside a quote, use double and single quotation marks -- like this:

" ' That's one for the medical journal, George,' he said. 'Doing . . .

thank you

You're welcome.

When including a quote within a sentence that already contains quotation marks, you have a few options to ensure clarity and proper formatting in your paper. One way is to use single quotation marks (' ') around the entire quote. Here's an example of how you could incorporate the quote into your paper:

In their study, the researchers encountered a remarkable case where an unconventional surgical technique was employed. According to the witness, the surgeon proclaimed, "That's one for the medical journal, George,' he said. 'Doing a Caesarian with a jack-knife and sewing it up with nine-foot, tapered gut leaders.'"

By enclosing the entire quote within single quotation marks, you distinguish the quote from the rest of your sentence. This usage is generally accepted, although different style guides may have specific guidelines for quoting within quotes. Therefore, it's always good to consult your paper's specific style guide (e.g., APA, MLA) for any specific requirements they may have on quoting within quotes.