Title of page or document. (Year, Month Day of publication). Retrieved from URL.
If there is no date listed, use (n.d.), which stands for "no date".
Maguire, R. (2016, May 13). Advertising surges in presidential race; Dark money dominating Senate contests. Retrieved from https://www.opensecrets.org/news/2016/05/advertising-surges-in-presidential-race-dark-money-dominating-senate-contests/.
Depression. (n.d.). Retrieved from http://www.apa.org/topics/depress/index.aspx.
Livesay, C. (2016, May 22). How Lebanon is coping with more than a million refugees [Video file]. Retrieved from http://www.pbs.org/video/2365761208/.
The bad map we see every presidential election [Video file]. (2016, May 16). Retrieved from https://youtu.be/hlQE4IGFc5A.