This example was accessed from an academic database. If it were accessed in print or from an academic database, the citation would look like this:
Smith, F. (2017, September). The addicted brain. National Geographic, 232(3), 30-53.
Parenthetical citation: (Smith, 2017)
Narrative citation: Smith (2017)
This same article is also available on the National Geographic website, under a different title. Since the title changed from the time it was originally published, include a retrieval date. If it were accessed from the website, the citation would look like this:
Smith, F. (2017, September). How science is unlocking the secrets of addiction. National Geographic. Retrieved October 30, 2019 from https://www.nationalgeographic.com/magazine/2017/09/the-addicted-brain/#close