Are you worried that you have too few citations? Double-check your assignment to see if you have been given any indication of the number or kind of source materials expected. Then share your writing with another reader. Do you have enough evidence or proof to support the ideas you put forward? Why should the reader believe the points you have made? Would adding another, expert voice strengthen your argument? Who else agrees or disagrees with the ideas you have written? Have you paraphrased ideas that you have read or heard? If so, you need to cite them. Have you referred to or relied on course material to develop your ideas? If so, you need to cite it as well.