Online magazine article
Online newspaper article
Newsletter article (no author)
Include the digital object indentifier (DOI) in the reference if one is assigned. If no DOI is assigned and you retreived the article online, include the homepage URL for the source that you are citing.
Journal article with DOI
Journal article without DOI (when DOI is not available or print version)
In-press article (not officially published yet)
Note: Use the following in-text citation: (Gilbert et al., 2004). When a
reference has up to seven authors, spell out all authors' names in the reference list.