Multiple references in same parentheses

Studies by Keen (2005); Lee (2004); and Wojk (2003) indicate that…

… along with other studies (Keen 2005; Lee 2004; Wojk 2003).

  • List each source alphabetically by author. Separate each work by a semicolon.
  • Use ‘et al.’ for a source with four or more authors.
  • All sources must be included in the reference list.