Answer
Last Updated: Aug 15, 2016     Views: 2943

In the 6th edition of the APA Manual of Style. (Sections 6.28, 6.29, 6.30 and 7.01), the rules for newsletters and editorials are as follows:

Author Surname, First Initial. Second Initial. (Last update or copyright date; if not
      known, put n.d.). Article title. Newsletter title, number[Editorial]. Retrieved from
      URL of specific document

Estes, T. (2010, May/June/July). Pushing the envelope. Primary care crisis an opportunity for nurse
      practitioners [Editorial]. Virginia Nurses Today18 (2), 16.