When there are six or more authors, only the name of the first author is given, followed by “et al.”
When the authors' names occur inside of the parentheses, they are connected with the symbol "&”; but when they occur outside of the parentheses, they are connected with the English word “and".
Templates
... (Author et al., Year).
Author et al. (Year) ...
Examples
... (Jones et al., 2012).
Jones et al. (2012) determine...