“Twenty years from now, you will be more disappointed by the things you didn’t do than the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream” (Twain add page number here)

Then in your Works Cited page:

Twain, Mark. Name of book underlined. Place of publication, Name of Publisher, year of publication

Without the book itself, I cannot give you all of the details, but I have given you the proper MLA citation format. Good luck….

Mark Twain also did public speaking. MLA format doesn’t always dictate the book it may have come from. The most important aspect is that you have the one who said it.

He meant that the main mandatory kind of coaching is that of the coaching gained by way of trial and mistake and by way of your man or woman real existence reviews. i’ve got faith; besides the reality that my memory is slightly sketchy and that i would be wrong approximately this, that Twain did no longer end education and dropped out as early as effortless college because of the fact i understand that he without postpone became a printers apprentice on the age of 11. Twain grow to be additionally especially known no longer purely as a properly known write, yet a slapstick comedian besides who grow to be known for his humorousness and sharp wit purely as much as he grow to be for his tenacious and mischievous character Huckleberry Finn

I don’t think it was in any particular book. Just one of his random quotes, of which there were many.