(Last name, Year)
Last name, First name and Last name, First name (Year). Title of article. Title of journal. Volume(issue), p. xxx-xxx, doi:xxxxxx
Some articles don't have page numbers but use article numbers instead. In these cases you can write "Article" followed by the article number in the reference list entry.
Last name, First name and Last name, First name (Year). Title of article. Title of journal. Volume(issue), Article xxxxxx, doi:xxxxxx
Some articles are published online before they have been assigned a volume and issue number. In these cases you can add "In press" to the reference list entry.
Last name, First name and Last name, First name (Year). Title of article. Title of journal. In press. doi:xxxxxx