When using works (e.g. journal article, e-book) obtained from academic research databases or platforms, APA style rules are:
Material without page numbers
Web citations require much of the same information as print sources, but also provide the location of an online source:
1. Permanent identifier, etc. DOI, URN, Handle, or permalink.
Search for DOI:
2. Reference to web archive, Internet Archive or Memento, either existing version or version archived by you.
3. Avoid using the URL.
Source and more information in Finnish: Hakala, J. (2017). E-viittaamisen ihanuus ja kurjuus. Informaatiotutkimus, 36(2), s. 77–85. https://doi.org/10.23978/inf.65190