Example: New American Standard Bible, Editorial introduction: re theorising population geography: mapping the unfamiliar. DJ Gear. Some books whose copyright have expired are sometimes freely available on the internet They are in the public domain. Permission should be sought before these sources are quoted, and a copy retained for reference.
You should in these cases not refere to the abstract in the proceeding but to the full article in the journal where it was published.
Malmberg, Anders. The New York Times, p.
If there is no DOI-number you should give the URL-link of the article and in some cases access date mainly articles that are freely available on the internet.