I am writing an article that requires citations in APA format. As you may know, that format requires page numbers
I am pulling quite a few articles from the journal of Remote Sensing (MDPI), which publishes almost all content as open access articles online. The problem is that they publish the articles online, and do not indicate a page number. For example, an article entitled "Time-Series Multispectral Indices from Unmanned Aerial Vehicle Imagery Reveal Senescence Rate in Bread Wheat" has the following short citation:
Remote Sens. 2018, 10, 809; doi:10.3390/rs10060809
From further investigating, I think the number 809 is the article in the volume, not the page number. Am I right on this? If so, how do you cite page numbers for a journal where they are not given?