This is a great question. I would say that there are several considerations here, because enotes is such a huge website with lots of information.
First, when it comes to the study guides, right under the title, there is citation button (right next to the PDF button). It is fairly easy to miss, but it is there. When you click on it, you will see an electronic citation that you can use. For example, if you are using the guide on Lord of the Flies, and you click on the button, you will see:
"Introduction." Novels for Students. Vol. 2. Gale Cengage, .eNotes.com. 6 Mar, 2012 <http://www.enotes.com/lord-of-the-flies/>
Second, since most of the anwers are short, what you can do is to look up the sources on the bottom of the page and hit the citation button again to get your citation information. I will link The Lord of the Flies, so that you can see an example.
The student's response to the previous answer regarding the proper way to cite an eNotes essay suggests that it is not a study guide from which he has drawn the quotation he hopes to use but rather the answer to his original question. The best way to site an eNotes Homework Help answer is probably to simply reference the educator's name, the date on which the educator's answer was posted, and the link to the educator's answer (in the event the student's assignment is being executed in electronic format). In this specific case, the proper link is:
The above link is to the student's original question with the educator, "accessteacher," answer included. In this case, then, the citation would read as follows:
accessteacher, eNotes educator essay, January 6, 2012. https://www.enotes.com/homework-help/can-you-help-me-with-two-good-thesis-statemen-404503.
No I do not get it. I am sorry. If I need to cite this answer:
Written by "accessteacher" January 6th
“The character of Lady Macbeth in Macbeth is one that gives testament to the power of guilt through her reaction to the crimes she willingly involved herself in”
But it is not a book, it's just an answer. What should I write?