How to cite regularly published editorials that have no specific titles? Many magazines and journals have standard editorial pieces such as a letter from the editor to introduce that month's publication; or closing comments written by different people.

For example, the New Hampshire Review has its "Last Word" column, such as this one: http://www.nhbr.com/June-24-2005/Last-Word/

Notice the entire article is titled "Last Word." There is no subtitle to further identify the article. (This is the case for this particular piece; other "Last Word" columns do have subtitles; so maybe this one is an anomaly.)

Some database aggregators write summaries. In this case, for the above article, the EBSCO title field has "Making history with the 80-20 rule" (see http://connection.ebscohost.com/c/articles/17494538/making-history-80-20-rule)

How do you cite something like this in APA style?
Citing editorials, using APA Style, is actually not that difficult. You just have to specify the relevant type of material ("Editorial" or "Letter to the editor") in square brackets and provide the full date of publication. The latter, in combination with the title of the editorial, naturally serves as a unique identifier for the piece (so, no subtitle is needed). For example, for the first source that you have mentioned in your question, I think that the appropriate citation would be the following (support):


  Last Word. [Editorial]. (2005, June 24). New Hampshire Business
  Review, p. A1.


In regard to the second source that you have mentioned, I think that you incorrectly refer to the entry as summary. IMHO it is simply a bibliographic entry, referring to the corresponding regular published article. In that case, I would cite the original article and not the EBSCO entry.