in my opinion, I wouldn't use any of them, it's only best if you use the book itself. Both the website and the college paper are formed on people's opinions. If this was something that was given to you as a test question, your best bet would be the college paper. The college paper would be filled with Shakespeare's theme and symbolism and some of these themes that he uses are usually not easy to find, especially is your reading the modern version.
Yes the two goods are therefore substitutes <span>if the price f a good X rises, causing the demand for good Y to fall for example two substitutes tea and coffee and the price of tea will be increase when the demand of coffee will decrease because now more people will demand tea and when demand increases price increases.
Hope it helps.
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